COVID-19 mRNA vaccine-mediated antibodies in human breast milk and their association with breast milk microbiota composition.

Newborns can acquire immunological protection to SARS-CoV-2 through vaccine-conferred antibodies in human breast milk. However, there are some concerns around lactating mothers with regards to potential short- and long-term adverse events and vaccine-induced changes to their breast milk microbiome composition, which helps shape the early-life microbiome. Thus, we sought to explore if SARS-CoV-2 mRNA vaccine could change breast milk microbiota and how the changes impact the levels of antibodies in breast milk. We recruited 49 lactating mothers from Hong Kong who received two doses of BNT162b2 vaccine between June 2021 and August 2021. Breast milk samples were self-collected by participants pre-vaccination, one week post-first dose, one week post-second dose, and one month post-second dose. The levels of SARS-CoV-2 spike-specific IgA and IgG in breast milk peaked at one week post-second dose. Subsequently, the levels of both antibodies rapidly waned in breast milk, with IgA levels returning to baseline levels one month post-second dose. The richness and composition of human breast milk microbiota changed dynamically throughout the vaccination regimen, but the abundances of beneficial microbes such as Bifidobacterium species did not significantly change after vaccination. Additionally, we found that baseline breast milk bacterial composition can predict spike-specific IgA levels at one week post-second dose (Area Under Curve: 0.72, 95% confidence interval: 0.58-0.85). Taken together, our results identified specific breast milk microbiota markers associated with high levels of IgA in the breast milk following BNT162b2 vaccine. Furthermore, in lactating mothers, BNT162b2 vaccines did not significantly reduce probiotic species in breast milk.

Intimacy during the COVID-19 pandemic: an online survey examining the impact of COVID-19 on the sexual practices and dating app usage of people living in Hong Kong.

BACKGROUND: Little attention has been paid to understanding the impact of the coronavirus disease 2019 (COVID-19) pandemic on sexual practices and dating app usage among the Chinese population. To fill this gap, we examined the sexual practices and dating app usage of Hong Kong residents during the COVID-19 pandemic. METHOD: An online survey was developed to collect data, and the participants were recruited via online social media. The respondents were asked to report on their sexual practices and dating app usage during the COVID-19 pandemic. RESULTS: In total, 249 participants met the inclusion criteria for the analysis. We found that more than 70% of the participants began masturbating more. Almost half of the participants reported decreases in various sexual activities with sexual partners, including vaginal, anal and oral sex. The vast majority of the study participants also reported a decline in sexual activities with casual partners, regular non-romantic partners and sex workers. Meanwhile, dating apps were used more frequently for chatting/texting, swapping photos, sexting and virtual dating. More than 50% of the participants reported less use of dating apps for face-to-face dates and sexual encounters. CONCLUSION: It is evident that the COVID-19 pandemic and its corresponding public health measures impacted the sexual practices and dating app usage of Hong Kong residents.

Using the Revised Health Care System Distrust Scale to evaluate healthcare distrust among Chinese men in Hong Kong: An analysis from a prostate cancer screening behaviours survey.

Information about the level of distrust in healthcare systems is very limited in Chinese populations, and no validated instrument has been developed to measure this distrust. Therefore, to begin addressing this research gap, this study evaluated the psychometric properties of a traditional Chinese version of the Revised Health Care System Distrust Scale and used it to assess the level of distrust in a healthcare system. The study involved a community-based personal interview survey of individuals in Hong Kong. A total of 340 men were randomly recruited. In addition to the distrust instrument, the two-item Trust in Physician Scale and the Patient Health Questionnaire-9 were used. The two-factor structure of the distrust scale was confirmed. The item-total correlations corrected for overlap were >0.4 for both the Competence and Values Distrust subscales, confirming the internal construct validity of the scale. The Cronbach's alpha coefficient was 0.77 for both subscales. The scores of both the Competence and Values subscales were moderately negatively correlated with the total score of the Trust in Physician Scale, providing support for convergent validity. Regarding known-group validity, the scale could differentiate people according to marital status, monthly personal income and severity of depressive symptoms. Moreover, we found that men who had previously undergone prostate cancer screening had higher Values Distrust scores than those who had not. The descriptive analysis showed that only about half of the participants reported that they received high-quality medical care and that the healthcare system provided excellent medical care, suggesting that more effort is needed to improve the quality of care and people's satisfaction with healthcare in Hong Kong. In summary, the translated traditional Chinese version of the Revised Health Care System Distrust Scale used in this study is a valid and reliable scale for assessing the level of distrust in a healthcare system.

Factors associated with group sex in heterosexual males and females attending a sexual health clinic in Melbourne, Australia: a cross-sectional survey.

BACKGROUND: There have been limited studies of group sex among heterosexual individuals. This study aimed to explore the factors associated with group sex among heterosexual males and females to improve risk assessment guidelines and inform sexually transmitted infection (STI) screening requirements. METHODS: A cross-sectional survey was conducted among heterosexual males and females aged ≥16 years attending the Melbourne Sexual Health Centre between March and April 2019. The survey asked about group sex participation, methods used to meet sexual partners, number of casual and/or regular partners, and injection drug use (IDU) in the previous 3 months. HIV and STI (chlamydia, gonorrhoea, syphilis) diagnoses were extracted. A multivariable logistic regression was conducted to identify the factors associated with group sex participation. RESULTS: A total of 698 participants (325 males, 373 females) were included and 4.7% (33/698) had participated in group sex in the previous 3 months. The proportion who participated in group sex increased with age (2.1% in 16-24 years, 5.5% in 25-34 years, 7.8% in ≥35 years, p trend =0.010). Meeting partners at sex venues (e.g. brothels) was associated with the highest odds of participating in group sex (aOR=5.74, 95% CI: 1.20-27.44), followed by dating apps (aOR=2.99, 95% CI: 1.36-6.58), friends/family (aOR=2.99, 95% CI: 1.34-6.69) and social venues (e.g. bar) (aOR=2.73, 95% CI: 1.18-6.30). Group sex was strongly associated with STI positivity (aOR=6.24, 95% CI: 2.41-16.13). There was no association between group sex and sex, casual and/or regular partners, HIV positivity or IDU. CONCLUSION: Heterosexual individuals participating in group sex had a six-fold risk of testing positive for STIs. Including group sex in a sexual history is useful to determine STI risk and inform testing practices. Safe sex messages on group sex that are delivered through multiple methods (e.g. at sex venues, social venues and dating apps simultaneously) would be beneficial.

Validating the use of the revised childbirth experience questionnaire in Hong Kong.

OBJECTIVE: To evaluate the psychometric properties of the traditional Chinese version of the Childbirth Experience Questionnaire (CEQ 2.0) and assess the childbirth experiences of Chinese women. METHODS: A cross-sectional survey was conducted in Hong Kong from July 2020 to February 2021. In total, 975 mothers, who could read traditional Chinese and gave birth in 2020 or 2021, were included in the analysis. Data were fitted into the model proposed by the original developers using the confirmatory factor analysis. The data were then randomly split into training and validation sets for exploratory and confirmatory factor analyses. Childbirth experiences were assessed. Factor structure, internal construct validity, internal consistency, and known-group validity were assessed. RESULTS: The originally proposed CEQ2.0 model showed a poor fit. An exploratory factor analysis identified a revised four-factor model (CEQ2.0-R) on a randomly split sample, which showed a satisfactory fit (CFI=0.912; TLI=0.884; SRMR=.053; RMSEA=0.072) on the other split sample. The revised scale comprised 13 items and four domains: (1)"Own capacity" (6 items), (2) "General support" (3 items), (3) "Perceived safety" (2 items), and (4) "Professional support" (2 items). CEQ2.0-R showed high internal construct validity and reliability. It can differentiate between participants with different characteristics, including parity, oxytocin augmentation, and companionship during labour. The childbirth experiences of the participants were merely positive, and participants reported that more support from midwives is needed. CONCLUSIONS: CEQ2.0-R can adequately describe the childbirth experiences of women in Hong Kong. The questionnaire is easy to be administer and can be used to assess several domains of the childbirth experiences. It may be useful to evaluate the aspects of support needed during childbirth.

Psychometric Evaluation of a Fear of COVID-19 Scale in China: Cross-sectional Study.

BACKGROUND: At the very beginning of the COVID-19 pandemic, information about fear of COVID-19 was very limited in Chinese populations, and there was no standardized and validated scale to measure the fear associated with the pandemic. OBJECTIVE: This cross-sectional study aimed to adapt and validate a fear scale to determine the levels of fear of COVID-19 among the general population in mainland China and Hong Kong. METHODS: A web-based questionnaire platform was developed for data collection; the study instruments were an adapted version of the 8-item Breast Cancer Fear Scale ("Fear Scale") and the 4-item Patient Health Questionnaire. The internal construct validity, convergent validity, known group validity, and reliability of the adapted Fear Scale were assessed, and descriptive statistics were used to summarize the participants' fear levels. RESULTS: A total of 2822 study participants aged 18 years or older were included in the analysis. The reliability of the adapted scale was satisfactory, with a Cronbach α coefficient of .93. The item-total correlations corrected for overlap were >0.4, confirming their internal construct validity. Regarding convergent validity, a small-to-moderate correlation between the Fear Scale and the 4-item Patient Health Questionnaire scores was found. Regarding known group validity, we found that the study participants who were recruited from Hong Kong had a higher level of fear than the study participants from mainland China. Older adults had a higher level of fear compared with younger adults. Furthermore, having hypertension, liver disease, heart disease, cancer, anxiety, and insomnia were associated with a higher fear level. The descriptive analysis found that more than 40% of the study participants reported that the thought of COVID-19 scared them. About one-third of the study participants reported that when they thought about COVID-19, they felt nervous, uneasy, and depressed. CONCLUSIONS: The psychometric properties of the adapted Fear Scale are acceptable to measure the fear of COVID-19 among Chinese people. Our study stresses the need for more psychosocial support and care to help this population cope with their fears during the pandemic.

Attitude Toward Prostate Cancer Screening in Hong Kong: The Importance of Perceived Consequence and Anticipated Regret.

There are long-standing debates about the benefits of prostate cancer screening. Conflicting trial results and inconsistent recommendations regarding prostate cancer screening in clinical guidelines highlight the importance of patient factors that influence decision making in prostate cancer screening. Attitude is an important factor associated with cancer screening. However, attitudes toward prostate cancer screening among Chinese men are still poorly understood. The objective of the study was to evaluate attitudes toward prostate cancer screening and their association with prostate cancer screening intention among Chinese men. In this community-based study, 340 males were randomly recruited. Three distinct concepts related to prostate cancer screening attitudes were evaluated, including perceived consequences of screening, moral obligation, and anticipated regret. The intention to have prostate cancer screening was asked. Only 5.00% of the study participants had prostate cancer screening before, while 69.71% have an intention to undergo screening in the future. Participants with a high level of anticipated regret also had a high likelihood to have screening in the future, with an adjusted odds ratio (aOR) of 1.82. Participants who had favorable attitudes toward the consequence of participating in prostate cancer screening had a high likelihood to undergo screening, with an aOR of 1.22. Participants who were more concerned about pain and invasion of privacy were less likely to have an intention to have prostate cancer screening, with aORs of 0.53 and 0.57, respectively. To enhance screening intention, public health programs should include components related to anticipated regrets and perceived consequences.

Associations Between Methods of Meeting Sexual Partners and Sexual Practices Among Heterosexuals: Cross-sectional Study in Melbourne, Australia.

BACKGROUND: The association between meeting partners on the web and sexual practices has been understudied in heterosexuals. OBJECTIVE: This study aims to examine the associations between the methods of meeting partners and sexual practices and HIV and sexually transmitted infections (STIs) in heterosexuals. METHODS: We conducted a survey among heterosexuals attending the Melbourne Sexual Health Centre in 2019. This survey asked about the methods through which the participants engaged in meeting their sexual partners, sexual practices, and intravenous drug use (IVDU) over the past 3 months. The participants' HIV and STI (chlamydia, gonorrhea, and syphilis) status was obtained from clinical testing. Multivariable logistic regression was used to examine the association between each method of meeting and the participants' sexual practices, IVDU, and STI status. RESULTS: A total of 698 participants (325 men and 373 women) were included in the study. Most of the participants reported using only one method to meet partners (222/325, 68.3% men; 245/373, 65.7% women; P=.05). The men met partners most commonly at social venues (eg, bar, pub, or party; 126/325, 38.8%), whereas the women met partners most commonly through friends or family (178/373, 47.7%). Paying for sex was associated with men meeting partners at sex venues (adjusted odds ratio [AOR] 145.34, 95% CI 26.13-808.51) and on the internet (AOR 10.00, 95% CI 3.61-27.55). There was no association between IVDU and methods of meeting. Social venues were associated with condomless vaginal sex among men (AOR 3.31, 95% CI 1.94-5.71) and women (AOR 2.58, 95% CI 1.61-4.13) and testing positive for STI among men (AOR 3.04, 95% CI 1.24-7.48) and women (AOR 3.75, 95% CI 1.58-8.89). CONCLUSIONS: Heterosexuals who met partners at social venues had a more than threefold risk of testing positive for STIs, indicating that heterosexuals may benefit from health promotion campaigns that are delivered through a public setting.

Developing and testing of an interactive internet-based intervention to reduce sexual harm of sexualised drug use ('chemsex') among men who have sex with men in Hong Kong: a study protocol for a randomised controlled trial.

BACKGROUND: Sexualised drug use, known as 'chemsex' or 'chemfun,' is the practice of intentionally using illicit drugs before or during sexual activates to enhance sexual arousal and pleasure. International and local data have both suggested that chemsex is common among men who have sex with men (MSM). Chemsex is generally seen with the engagement of risky sexual activities and therefore poses a threat regarding the potentially increased spread of human immunodeficiency virus and other sexually transmitted infections. However, little work has been done on the primary prevention of chemsex among MSM. Therefore, the aim of this study is to develop and evaluate an interactive internet-based intervention in reducing the sexual harms of chemsex among MSM in Hong Kong, METHODS: A two-armed, randomised, parallel-group trial with a three-month follow-up period will be conducted. 250 MSM aged 18 years or the above will be recruited through local non-governmental organisations, social media and by snowballing in Hong Kong. Participants will be randomly allocated into either the intervention (n = 125) or control group (n = 125). The interactive internet-based intervention will be developed based on the theory of planned behaviours. Participants in the control group will receive a web-based intervention without any sexual health information and without any interactive components. The primary outcomes will be self-efficacy in refusing risky sexual behaviours and chemsex, as measured by the Drug Avoidance Self-Efficacy Scale, the Self-Efficacy for Sexual Safety and the Condom Self-Efficacy Scale. Subjects in both groups will be evaluated at baseline and 3 months after baseline. DISCUSSION: To the best of our knowledge, this will be the first interactive internet-based intervention to specifically target chemsex among MSM. This project can help in the development and testing of culturally relevant health promotion programmes that reduce chemsex among MSM. Using an online delivery mode, the intervention is capable of reaching a large population of targets at a relatively low cost and thus has the potential to reduce the public health burden of chemsex and other risky sexual behaviours among MSM in a cost-effective manner. TRIAL REGISTRATION: International standard randomized controlled trial number (ISRCTN) registry: ISRCTN20134522 registered on 17 March 2021.

The Experience of Using Dating Applications for Sexual Hook-Ups: A Qualitative Exploration among HIV-Negative Men Who Have Sex With Men in Hong Kong.

Men who have sex with men (MSM) use dating applications (apps) to explore various romantic and sexual relationships. This qualitative study aimed to describe HIV-negative MSM's experiences with app usage, the sexual activities arranged accordingly and their experiences in using dating apps to arrange sexual encounters. Thirty-one MSM who were sexually active and who used dating apps were recruited. Individual semi-structured interviews were conducted. Qualitative data were thematically analyzed to outline significant phenomena and perceptions. The factors associated with matching on apps included sex roles, human immunodeficiency virus serostatus and availability of a venue for meetup. Facilitated by these apps, diverse types of sexual encounters were arranged. Condoms were typically used for safer intercourse, except by people who were younger and inexperienced or when drugs were consumed before or during sex (chemsex). Extensive interest in non-penetrative sexual behaviors was expressed by our sample. Searching for post-exposure prophylaxis methods and/or sexual health screenings was common after exposure to risk of infections. Sexually abusive encounters were followed by changes in sex-searching habits and lowered trust in relationship formation. The results of this study are important for the development of appropriate interventions to promote safer sexual practices among HIV-negative MSM dating app users.

The English and Chinese language versions of the Short Form 12-item Health Survey are equivalent.

BACKGROUND: The Short Form 12-item Health Survey (SF-12v2) was originally developed in English, but it is also available in Hong Kong (HK) Chinese. While both language versions had their measurement properties well assessed in their respective populations, their measurement invariance in scores has not been examined. Therefore, we aimed to assess their measurement invariance. METHODS: We conducted a cross-sectional study on individuals aged 18 years or older at a university campus. Those who were bilingual in English and Chinese were randomly assigned to self-complete either the standard English or the HK Chinese SF-12v2. Measurement invariance of the two components and eight scales of the SF-12v2 was concluded if the corresponding 90% confidence interval (CI) for the difference between the two language versions entirely fell within the minimal clinically important difference of ± 3 units. Multiple-group confirmatory factor analysis (CFA) was also performed. RESULTS: A total of 1013 participants completed the SF-12v2 (496 in English and 517 in HK Chinese), with a mean age of 22 years (Range 18-58), and 626 participants (62%) were female. There were no significant differences in demographics. Only the physical and mental components and the mental health (MH) scale had their 90% CIs (0.21 to 1.61, - 1.00 to 0.98, and - 0.86 to 2.84, respectively) completely fall within the ± 3 units. The multiple-group CFA showed partial strict invariance. CONCLUSIONS: The English and HK Chinese versions of the SF-12v2 can be used in studies with their two components and MH scores pooled in the analysis.

Intimate Partner Sexual Violence and Mental Health Indicators Among Chinese Emerging Adults.

Intimate partner sexual violence (IPSV) among emerging adults, including heterosexuals and sexual minorities in the Chinese population, is poorly understood. Focusing on college students, the objectives of the present study were to estimate the prevalence of IPSV among Chinese emerging adults, examine the association between sexual orientation and IPSV, and evaluate the mental health and quality of life of survivors of IPSV. Data were collected from four university campuses in Hong Kong. A total of 1,015 participants were included in the data analysis. The prevalence of IPSV as identified by Conflict Tactics Scale (CTS)-2 was 12.1%. There was no gender difference in the prevalence of IPSV. Multiple logistic regression found that being older; having experienced childhood sexual abuse and having a smoking habit; and belonging to a sexual minority were factors associated with IPSV. Multiple linear regression found that IPSV survivors were more likely to have higher levels of anxiety and depression, more severe psychosomatic symptoms, and poorer quality of life in three domains: psychological, social relationships, and environment when compared with those without IPSV experience. The documented factors underscored the importance of awareness that men and sexual minorities might incur IPSV, which should receive more attention in IPSV prevention programs. Also, interventions for IPSV survivors should be targeted at improving their mental health and quality of life and sex education should place more emphasis on sexual consent and sexual health in dating relationships.

Brief Report: Group Sex Among Men Who Have Sex With Men in the Era of PrEP: A Cross-Sectional Study.

BACKGROUND: Group sex has been commonly reported among gay and bisexual men who have sex with men (GBMSM); however, there are limited studies on the factors associated with participating in group sex. SETTING: A cross-sectional study among GBMSM attending a sexual health clinic in Melbourne, Australia. METHODS: Univariable and multivariable logistic regression were performed to examine the association between GBMSM participating in group sex in the previous 3 months and their demographic characteristics, including age, pre-exposure prophylaxis (PrEP) use, HIV status, any STI (gonorrhea, chlamydia, syphilis) diagnosis on the day, and method of seeking partners. RESULTS: There were 357 GBMSM who participated in the survey and their mean age was 32.9 years (SD = 10.9). Almost a third (n = 115; 32.2%) had participated in group sex in the previous 3 months. GBMSM who sought sex partners at sex on premises venues (SOPVs) [aOR 5.83; 95% confidence interval (CI): 3.23 to 10.53] had the highest odds of group sex participation after adjusting for other potential confounders. Compared with GBMSM not living with HIV and not taking PrEP, GBMSM taking PrEP had higher odds of group sex participation (aOR 2.09; 95% CI: 1.05 to 4.15), but GBMSM living with HIV did not (aOR 0.93; 95% CI: 0.23 to 3.68).Recent group sex participation was not associated with being diagnosed with any STI (chlamydia, syphilis, or gonorrhea) on the day in the adjusted analyses. CONCLUSION: PrEP users and MSM attending SOPVs are more likely to participate in group sex. SOPV could be important venues for future public health campaigns.

The safe use of dating applications among men who have sex with men: a study protocol for a randomised controlled trial to evaluate an interactive web-based intervention to reduce risky sexual behaviours.

BACKGROUND: Notably, both international and local studies have found a high prevalence of sexually transmitted infections (STIs) and risky sexual behaviours, such as condomless anal sex, substance misuse in conjunction with sex ('chemsex') and group sex, among men who have sex with men (MSM) dating application (app) users. Although the use of dating apps is an emerging sexual risk factor, little effort has been expended on the promotion of safe sex and good sexual health among the users of those apps. Therefore, the aim of the proposed study is to develop and evaluate the effectiveness of an interactive web-based intervention in improving the sexual health of MSM dating app users in Hong Kong. METHODS: A two-armed randomised controlled trial will be conducted. Chinese MSM dating app users will be recruited and randomly allocated into either the intervention (n = 200) or control group (n = 200). Subjects in the intervention group will receive the web-based intervention containing interactive content that (1) encourages a positive attitude towards consistent condom use and HIV/STI testing and negative attitude towards chemsex and group sex; (2) positions condom use and regular HIV/STI testing as normative; and (3) targets improved perceived self-efficacy concerning condom use and negotiation and HIV/STI testing. The control group will receive only web-based information without sexual health components. Subjects in both groups will be evaluated at baseline and three and 6 months after baseline. The primary outcome will be the frequency of condomless anal sex in the past 3 months. DISCUSSION: The proposed study will aid development of culturally relevant health promotion programmes aimed at minimising the potential harm of dating app use and promoting the sexual health of MSM dating app users. The web-based intervention, if found successful, will have important clinical and policy implications, as it can be adopted by the government and non-governmental organisations targeting MSM. Moreover, the proposed intervention can reach many MSM at relatively low cost, and thus has the potential to check the burgeoning HIV/STI epidemic among MSM in Hong Kong in a cost-effective manner. TRIAL REGISTRATION: International standard randomized controlled trial number (ISRCTN) registry: ISRCTN16681863 registered on 28 April 2020.

Impact of household composition and satisfaction with family life on self-reported sexual health outcomes of high-school students in Hong Kong.

BACKGROUND: The study aimed to examine the impact of household composition and satisfaction with family life on sexual behaviours among high school male and female students (aged 11-22 years) in Hong Kong. METHOD: High schools were randomly selected, and the final sample comprised 25 schools. Students were divided into two groups ('living with both biological parents' vs 'not living with both biological parents'). Students were asked to rate their satisfaction with family life on a five-point Likert scale in a self-administered questionnaire. Dependent variables were sexual experience, sexual harassment, sexting and nude chats. Multiple logistic regression was used to analyse the results. RESULTS: 3907 students were included in the analysis. 202 students (5.2%) were sexually active. 505 students had ever (13.0%) sexually harassed others and 303 students (7.8%) had ever been sexually harassed by others. 58 students (1.5%) had ever had nude chats. 1005 students (25.8%) had sexted in the last 12 months. Students who lived with both biological parents were less like to be sexually active, to sext and to have nude chats than those who did not. Students who had higher family life satisfaction were less likely to be sexually active, to sexually harass others, to be sexually harassed by others, to sext and to have nude chats than students who had lower satisfaction with their family life. CONCLUSIONS: Sexual health programmes and interventions should consider family functioning. Students who have low family satisfaction and those who do not live with both their biological parents should be targeted for sexual health interventions.

Measurement properties of ThyPRO short-form (ThyPRO-39) for use in Chinese patients with benign thyroid diseases.

PURPOSE: To evaluate the validity and reliability of a newly-translated Thyroid-specific Patient-Reported Outcome short-form (ThyPRO-39) instrument for ethnic-Chinese patients suffering from benign thyroid diseases. METHODS: The translation and cross-cultural adaptation of the English ThyPRO-39 were performed using the double forward translation, reconciliation, single backward translation, and cognitive debriefing, followed by a panel review. Cross-sectional data of 308 patients with benign thyroid diseases were utilized for this psychometric evaluation of ThyPRO-39 instrument. Convergent validity between similar construct in the ThyPRO-39, SF-6D, and SF-12v2 was assessed using Spearman correlations. The internal construct validity was assessed by corrected item-total correlations. Sensitivity of the ThyPRO-39 domain scores was determined by performing known group comparisons by independent t test. The internal consistency reliability was assessed by Cronbach's alpha coefficient. RESULTS: Significant floor effects were observed in 9 out of 13 domains of the ThyPRO-39. The hypothesized correlations between similar constructs in the ThyPRO-39 and the SF-12v2 and SF-6D were generally observed, supporting convergent validity. The internal construct validity was supported in most items, except eight items in six scales. Scale score of hyperthyroid symptoms of the ThyPRO-39 was significantly higher in the group with Graves' disease or hyperthyroid disease than the group without Graves' disease nor hyperthyroid disease. Scale scores of eye symptoms and impaired daily life were significantly higher in the incidental group than the non-incidental group. For six domains (hyperthyroid symptoms, hypothyroid symptoms, eye symptoms, tiredness, depressivity, and emotional susceptibility), Cronbach's alpha did not reach the recommended standard of 0.7. CONCLUSIONS: This was the first psychometric study to translate and adapt the ThyPRO-39 instrument for non-Caucasian patients, and report its validity and reliability for use in Chinese patients with benign thyroid diseases. Given the low item-total correlations in eight items and low internal consistency reliability in respective scales of the ThyPRO-39, we suggest that the improvement of those eight items should produce a more valid and reliable ThyPRO-39 instrument.

The mediating factors in the relationship between lower urinary tract symptoms and health-related quality of life.

OBJECTIVES: An earlier study found that mental health partially mediates the relationship between lower urinary tract symptoms (LUTS) severity and health-related quality of life (HRQOL). In other words, LUTS adversely affects mental health, which in turn adversely affects HRQOL. A major limitation of the previous study was its cross-sectional design. The aim of this study is to evaluate whether changes in mental health mediated the association between changes in the severity of LUTS and changes in HRQOL over 24 months by using Baron and Kenny's regression procedure and Preacher and Hayes's bootstrapping method. RESULTS: We found that changes in mental health were a mediator in the relationship between the change of LUTS severity and the change of LUTS-specific HRQOL. Changes in LUTS severity lead to changes in mental health, which in turn affects the change of LUTS-specific HRQOL. It was observed however that changes in mental health did not mediate the relationship between the change of LUTS severity and the change of the physical aspects of generic HRQOL. These findings suggest that in order to optimize LUTS-specific HRQOL, both LUTS severity and mental health may need to be addressed concurrently.

Mental health and health-related quality of life of Chinese college students who were the victims of dating violence.

PURPOSE: The aim of the study is to evaluate the mental health and health-related quality of life (HRQOL) of Chinese college students who were the victims of dating violence. METHODS: Six hundred and fifty-two subjects were included in the data analysis. Subjects completed a structured questionnaire containing the Woman Abuse Screening tool, the Hospital Anxiety and Depression Scale, the 10-item version of the Perceived Stress Scale (PSS-10) and the World Health Organization Quality of Life-BREF Instrument (WHOQOL-BREF). RESULTS: Analysis by independent t test suggested that victims of dating violence had more severe depressive, anxiety and stress symptoms and poorer HRQOL than non-victims. Multiple linear regression models found that more severe dating violence victimization was associated with more severe depressive, anxiety and stress symptoms. The mediation analysis found that after simultaneously controlling for the degree of depressive, anxiety and stress symptoms, the direct effect between dating violence severity and HRQOL, as measured by overall HRQOL and the global health, physical and environment domains of the WHOQOL-BREF, was statistically insignificant, supporting a full-mediation model. The relationship between dating violence severity and the social domain of HRQOL was partially mediated by the degree of depressive, anxiety and stress symptoms. CONCLUSION: Victims of dating violence had poorer mental health and HRQOL than non-victims. The study findings affirm the importance of assessing depressive, anxiety and stress symptoms in victims and the need to improve their depressive, anxiety and stress symptoms to diminish the negative effects of dating violence, which are apparent in their HRQOL.

Association Between Using Smartphone Dating Applications and Alcohol and Recreational Drug Use in Conjunction With Sexual Activities in College Students.

BACKGROUND: The association between using smartphone dating applications (apps) and substance use in conjunction with sexual activities was only examined in homosexual men. This association was poorly understood in heterosexual samples. OBJECTIVE: To explore the association between using dating apps and alcohol, and use of recreational drug in conjunction with sexual activities in college students. DESIGN: 666 students from four universities in Hong Kong were recruited in this cross-sectional study in the year 2015. Outcome measures included the use of dating apps, sexual history, and drug and alcohol use. Multivariable logistic regressions were employed. RESULTS: The use of dating apps for more than 1 year was found to be associated with recreational drug use in conjunction with sexual activities (adjusted odds ratio: 7.23). Other risk factors of recreational drug use in conjunction with sexual activities included being bisexual/homosexual male, a smoker, and having one's first sexual intercourse at the age of less than 16 years. The use of dating apps was not a risk factor for alcohol consumption in conjunction with sexual activities. Risk factors for alcohol consumption in conjunction with sexual activities included being older, having monthly income more than HKD5,000, and a smoker. Furthermore, risk factors for alcohol consumption in conjunction with the last sexual activity included currently being in a dating relationship, a smoker, and having sex with a casual partner. CONCLUSIONS: Using dating apps is an emerging risk factor of drug misuse. Interventions for practising safe sex and preventing drug use should be targeted at dating app users.