Unraveling the diagnostic odyssey: stimulator of interferon gene-associated vasculopathy with onset in infancy in a 30-year-old female

Stimulator of interferon gene (STING)-associated vasculopathy with onset in infancy (SAVI) is an extremely rare autoinflammatory disease. We present the case of a female Korean patient with early-onset interstitial lung disease who was initially suspected to have systemic lupus erythematosus (SLE) but was ultimately diagnosed with SAVI. The patient exhibited signs of interstitial lung disease and cutaneous manifestations before the age of 1 year and continued to have recurrent fever accompanied by pulmonary infiltrates. Based on positive findings for antibodies associated with SLE, such as antinuclear antibodies and anti-double-stranded DNA, the pulmonary involvement was considered a manifestation of SLE. Another significant symptom was recurrent skin ulceration, which led to partial spontaneous amputation of most of the toes due to inflammation. Given the early onset of interstitial lung disease, severe skin ulcers, and symptoms resembling SLE, autoinflammatory syndrome, especially SAVI was suspected.Following confirmation by genetic testing at age 29 years, the patient was started on tofacitinib, a Janus kinase inhibitor. Despite the prolonged use of multiple immunosuppressive therapies, the patient’s lung condition continued to worsen, ultimately requiring lung transplantation. This observational report highlights the importance of considering SAVI as a potential diagnosis when manifestations of interstitial lung disease are observed during infancy. Early proactive treatment is crucial for lung involvement, as this can have long-term effects on patient’s prognosis.

Surgical Experience of Primary Hyperparathyroidism: Analysis of Postoperative Outcomes / 대한이비인후과학회지

Background and Objectives@#The standard surgical procedure for primary hyperparathyroidism is the bilateral exploration. However, the unilateral exploration and direct focused parathyroidectomy have been performed to reduce surgical morbidity. The purpose of this study was to report the surgical outcomes and efficacy of the bilateral exploration, unilateral exploration, and direct focused approaches for primary hyperparathyroidism.Subjects and Method We retrospectively analyzed the surgical outcomes of 87 patients with primary hyperparathyroidism from January 2007 to December 2017. We compared the operative time, complication and recurrence rate between the three operative methods. @*Results@#The most common histopathology was parathyroid adenoma, which was found in 73 cases (83.9%), followed by hyperplasia. In terms of complications, there were two cases of transient vocal cord palsy, one case of hematoma, one case of hypocalcemia and one case of hungry bone syndrome. Recurrence occurred in two (2.3%) out of 87 cases. There was no significant difference in the recurrence rate between the three surgical approaches. @*Conclusion@#The success rate of surgery for primary hyperparathyroidism is high. Direct focused parathyroidectomy may be a good option for parathyroid adenoma if the localization tests localize the lesion. The bilateral exploration is effective for parathyroid hyperplasia.

A Case of Pediatric Follicular Lymphoma in the Parotid Gland / 대한이비인후과학회지

Pediatric follicular lymphoma (PFL) is rare, and it has distinctive characteristics compared to adult-type follicular lymphoma. PFL mainly occurs in males and is likely to be localized to cervical lymph nodes and tonsils. Extranodal type PFL also occurs in the testis, epididymis, skin, gastrointestinal tract, and parotid gland, etc. The prognosis of PFL is better than adulttype follicular lymphoma. Surgical excision is a good option, and the majority of PFL cases show complete remission after surgery. We have encountered a case of PFL of the parotid gland in a 12-year-old boy. Here, we report this case with a review of the literature.

Prognostic value of carcinoembryonic antigen levels before and after curative surgery in colon cancer patients

Purpose@#CEA is a useful tumor marker for colon cancer. The aim of this study was to investigate the prognostic value of changes in CEA levels before and after surgery in colon cancer patients who underwent radical surgery. @*Methods@#A total of 601 colon cancer patients who underwent radical surgery from January 2007 to December 2017 at a single institution were evaluated. Patients were categorized according to preoperative and postoperative CEA levels.We adjusted patient characteristics using propensity score matched analysis between groups and compared survival outcomes according to changes in CEA levels before and after surgery. @*Results@#According to the preoperative and postoperative CEA levels, patients were classified into 3 groups: group 1, ≤5 and ≤5 ng/mL, respectively (n = 407); group 2, >5 and ≤5 ng/mL, respectively (n = 127); and group 3 (>5 and >5 ng/mL, respectively (n = 67). Postoperative CEA elevation was associated with adverse clinical features. Before and after matching, the patients in group 3 showed significantly lower disease-free survival and overall survival rates compared to the patients in group 1 and group 2. In multivariate analysis, changes in CEA levels were an independent prognostic factor of overall survival (P = 0.041). @*Conclusion@#The changes in CEA levels before and after surgery can be a useful prognostic factor for disease-free survival and overall survival in colon cancer patients.

Surgical impact on anxiety of patients with breast cancer: 12-month follow-up prospective longitudinal study

Purpose@#Breast cancer diagnosis and treatment often produce stress in patients. Anxiety is one of the most prevalent psychological symptoms perceived by breast cancer patients. This study aims to evaluate the temporal patterns of anxiety and find factors associated with persistent anxiety during breast cancer treatment. @*Methods@#This is prospective cohort study. Between July 2010 and July 2011, we recruited patients with nonmetastatic breast cancer who were expected to receive adjuvant chemotherapy (n = 411) from 2 cancer hospitals in Seoul, Korea. Anxiety was measured using the Hospital Anxiety and Depression Scale. @*Results@#The mean age of the participants was 46.4 ± 7.9 years. Preoperatively, 44.5% (183 of 411) of the patients showed abnormal anxiety. The proportion of the abnormal anxiety group significantly decreased after surgery (P < 0.01) and this phenomenon continued until the 12-month follow-up point. Patients experienced renewed anxiety at 12 months when the main adjuvant therapies were finished. Socioeconomic factors were not associated with persistent anxiety. Pain, breast, and arm symptoms were significantly higher in the persistently abnormal group, especially at postoperative months 6 and 12. @*Conclusion@#Surgery was a major relieving factor of anxiety, and patients who finished their main adjuvant treatment experienced renewed anxiety. Surgeons should be the main detectors and care-givers with respect to psychological distress in breast cancer patients. To reduce persistent anxiety, caring for the patient’s physical symptoms is important.

Surgical impact on anxiety of patients with breast cancer: 12-month follow-up prospective longitudinal study

Purpose@#Breast cancer diagnosis and treatment often produce stress in patients. Anxiety is one of the most prevalent psychological symptoms perceived by breast cancer patients. This study aims to evaluate the temporal patterns of anxiety and find factors associated with persistent anxiety during breast cancer treatment. @*Methods@#This is prospective cohort study. Between July 2010 and July 2011, we recruited patients with nonmetastatic breast cancer who were expected to receive adjuvant chemotherapy (n = 411) from 2 cancer hospitals in Seoul, Korea. Anxiety was measured using the Hospital Anxiety and Depression Scale. @*Results@#The mean age of the participants was 46.4 ± 7.9 years. Preoperatively, 44.5% (183 of 411) of the patients showed abnormal anxiety. The proportion of the abnormal anxiety group significantly decreased after surgery (P < 0.01) and this phenomenon continued until the 12-month follow-up point. Patients experienced renewed anxiety at 12 months when the main adjuvant therapies were finished. Socioeconomic factors were not associated with persistent anxiety. Pain, breast, and arm symptoms were significantly higher in the persistently abnormal group, especially at postoperative months 6 and 12. @*Conclusion@#Surgery was a major relieving factor of anxiety, and patients who finished their main adjuvant treatment experienced renewed anxiety. Surgeons should be the main detectors and care-givers with respect to psychological distress in breast cancer patients. To reduce persistent anxiety, caring for the patient’s physical symptoms is important.

Risk Factors and Clinical Features of Recurrent Benign Paroxysmal Positional Vertigo / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES@#Benign paroxysmal positional vertigo (BPPV) is treated with appropriate canalith repositioning procedures, which are very effective for the treatment of BPPV. Nevertheless, the recurrence of BPPV may occur after the initial successful treatment. The purpose of this study was to investigate the risk factors and clinical features of recurrent BPPV.SUBJECTS AND METHOD: The retrospective study was performed for 227 patients who were diagnosed with BPPV and treated with appropriate canalith repositioning procedures from March 2013 to December 2014. We analyzed various clinical characteristics, locations and types of canalith for the whole BPPV patients, and the interval and frequency of recurrence in the patients of recurrent BPPV.@*RESULTS@#Of the total of 227 BPPV patients, 47 patients were recurrent BPPV (21%). The patients of recurrent BPPV were significantly older than those of non-recurrent BPPV (p=0.034). BPPV patients recurred more with increased age, with the significantly increased frequency of recurrence (p=0.010). Twenty two patients were posterior semicircular canal canalolithiasis (PSCC) (46.8%) and 25 patients were lateral semicircular canal canalolithiasis (LSCC) (53.2%). The number of canalith repositioning procedures was significantly higher in LSCC patients than in PSCC patients (p=0.041). The location change of affected canal were identified for 23 patients and the type change of LSCC to ipsilateral PSCC was the most common.@*CONCLUSION@#Age is an important prognostic factor to be considered in BPPV recurrence. Also, the affected semicircular canals were frequently changed in the recurrent BPPV.

Risk Factors and Clinical Features of Recurrent Benign Paroxysmal Positional Vertigo / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Benign paroxysmal positional vertigo (BPPV) is treated with appropriate canalith repositioning procedures, which are very effective for the treatment of BPPV. Nevertheless, the recurrence of BPPV may occur after the initial successful treatment. The purpose of this study was to investigate the risk factors and clinical features of recurrent BPPV. SUBJECTS AND METHOD: The retrospective study was performed for 227 patients who were diagnosed with BPPV and treated with appropriate canalith repositioning procedures from March 2013 to December 2014. We analyzed various clinical characteristics, locations and types of canalith for the whole BPPV patients, and the interval and frequency of recurrence in the patients of recurrent BPPV. RESULTS: Of the total of 227 BPPV patients, 47 patients were recurrent BPPV (21%). The patients of recurrent BPPV were significantly older than those of non-recurrent BPPV (p=0.034). BPPV patients recurred more with increased age, with the significantly increased frequency of recurrence (p=0.010). Twenty two patients were posterior semicircular canal canalolithiasis (PSCC) (46.8%) and 25 patients were lateral semicircular canal canalolithiasis (LSCC) (53.2%). The number of canalith repositioning procedures was significantly higher in LSCC patients than in PSCC patients (p=0.041). The location change of affected canal were identified for 23 patients and the type change of LSCC to ipsilateral PSCC was the most common. CONCLUSION: Age is an important prognostic factor to be considered in BPPV recurrence. Also, the affected semicircular canals were frequently changed in the recurrent BPPV.

Role of Helix 8 in Dopamine Receptor Signaling

G protein-coupled receptors (GPCRs) are membrane receptors whose agonist-induced dynamic conformational changes trigger heterotrimeric G protein activation, followed by GRK-mediated phosphorylation and arrestin-mediated desensitization. Cytosolic regions of GPCRs have been studied extensively because they are direct contact sites with G proteins, GRKs, and arrestins. Among various cytosolic regions, the role of helix 8 is least understood, although a few studies have suggested that it is involved in G protein activation, receptor localization, and/or internalization. In the present study, we investigated the role of helix 8 in dopamine receptor signaling focusing on dopamine D1 receptor (D1R) and dopamine D2 receptor (D2R). D1R couples exclusively to Gs, whereas D2R couples exclusively to Gi. Bioinformatic analysis implied that the sequences of helix 8 may affect GPCR-G protein coupling selectivity; therefore, we evaluated if swapping helix 8 between D1R and D2R changed G protein selectivity. Our results suggest that helix 8 is not involved in D1R-Gs or D2R-Gi coupling selectivity. Instead, we observed that D1R with D2R helix 8 or D1R with an increased number of hydrophobic residues in helix 8 relative to wild-type showed diminished β-arrestin-mediated desensitization, resulting in increased Gs signaling.

Comparison of quality of life and depression between hematopoietic stem cell transplantation survivors and their spouse caregivers

BACKGROUND: Hematopoietic stem cell transplantation (HSCT) is an exhausting process that impacts both the patient and caregiver. METHODS: This was a cross-sectional, HSCT survivor-spouse caregiver matching study to determine quality of life (QoL) and depression among HSCT survivors and their caregivers. QoL and depression were measured with the World Health Organization Quality of Life: Brief Version (26 items) and the 9-item Patient Health Questionnaire, respectively. Data from 97 married couples were analyzed. RESULTS: There were no significant differences in overall QoL and psychological, social, and environmental health between survivors and spouse caregivers (P=0.345, 0.424, 0.415, and 0.253); however, physical QoL was better in the spouse caregiver group (P=0.011). There was no difference in mean depression scale scores (5.3 vs. 5.1, P=0.812) or proportion of severe depression (15.6% vs. 13.7%, P=0.270) between the two groups. We found that family income had a significant impact on overall QoL and environmental health among spouse caregivers (P=0.013 and 0.023), and female gender, co-morbidities, and family income were the important factors associated with depression among spouse caregivers (P=0.007, 0.017 and 0.049). CONCLUSION: This study found that there were no significant differences in QoL or level of depression between HSCT survivors and their spouse caregivers. Family income, gender, and co-morbidities showed significant association with spouse caregiver distress.

Health-Related Quality of Life in Non-Hodgkin Lymphoma Survivors: A Prospective Cohort Study / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: We evaluated health-related quality of life (HRQOL) in long-term survivors of indolent and aggressive non-Hodgkin lymphoma (NHL). MATERIALS AND METHODS: TheHRQOLwas assessed by the European Organization for Research and Treatment of Cancer Quality-of-Life Questionnaire Core 30 (EORTC QLQ-C30) at diagnosis in NHL patients between 2008 and 2011, and follow-up evaluation was conducted from June 2014 to February 2015 using EORTC QLQ-C30 and the quality of life in cancer survivors (QOL-CS) questionnaire. We used linear mixed models to compare changes in HRQOL between indolent and aggressive NHL over time. RESULTS: The HRQOL of long-term survivors with aggressive NHL improved to the similar level of indolent NHL during the follow-up survey. However, survivors of NHL were found to fear the probability of relapse and second malignancy, and the degree of fear was not different between survivors with aggressive stage I/II or III/IV NHL (p > 0.05). Furthermore, a half of survivors reported impaired sense of psychosocial well-being regardless of aggressiveness and stage during follow-up survey. More than 65% of survivors thought they did not receive sufficient support from others, and patients who had financial difficulties at diagnosis were more frequently associated with suffering from insufficient support. Impaired physical and cognitive functioning at diagnosis was significantly associated with lack of life purpose in long-term survivors. CONCLUSION: The HRQOL of aggressive NHL survivors improved to a similar level to that of indolent NHL. However, the majority of survivors still had fear of relapse, and psychosocial well-being remained unmet needs.

Comprehensive Analysis of Non-Synonymous Natural Variants of G Protein-Coupled Receptors

G protein-coupled receptors (GPCRs) are the largest superfamily of transmembrane receptors and have vital signaling functions in various organs. Because of their critical roles in physiology and pathology, GPCRs are the most commonly used therapeutic target. It has been suggested that GPCRs undergo massive genetic variations such as genetic polymorphisms and DNA insertions or deletions. Among these genetic variations, non-synonymous natural variations change the amino acid sequence and could thus alter GPCR functions such as expression, localization, signaling, and ligand binding, which may be involved in disease development and altered responses to GPCR-targeting drugs. Despite the clinical importance of GPCRs, studies on the genotype-phenotype relationship of GPCR natural variants have been limited to a few GPCRs such as β-adrenergic receptors and opioid receptors. Comprehensive understanding of non-synonymous natural variations within GPCRs would help to predict the unknown genotype-phenotype relationship and yet-to-be-discovered natural variants. Here, we analyzed the non-synonymous natural variants of all non-olfactory GPCRs available from a public database, UniProt. The results suggest that non-synonymous natural variations occur extensively within the GPCR superfamily especially in the N-terminus and transmembrane domains. Within the transmembrane domains, natural variations observed more frequently in the conserved residues, which leads to disruption of the receptor function. Our analysis also suggests that only few non-synonymous natural variations have been studied in efforts to link the variations with functional consequences.

Validation of the Korean Version of the Quality of Life–Cancer Survivors (QOL-CS-K) Questionnaire in Lymphoma Survivors / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: The objective of this study was to validate the Korean version of the Quality of Life–Cancer Survivors (QOL-CS-K) in a sample of lymphoma survivors. MATERIALS AND METHODS: We conducted a cross-sectional survey of lymphoma survivors who had survived for at least 24 months since diagnosis. Participants were recruited at the outpatient clinics and at a hospital event in a tertiary hospital in Seoul, Korea. Survivors were asked to complete the QOL-CS-K and the European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30) questionnaires. To determine test-retest reliability, a second questionnaire was sent to participants who completed the first questionnaire adequately. Exploratory factor analysis and Pearson’s correlations were used for evaluating reliability and validity of the QOL-CS-K. RESULTS: Among 257 survivors, 245 (95.3%) completed all questionnaires and had no missing data. The mean age of study participants was 52.2 years, 54.9% were men, and the mean time since diagnosis was 4.0±1.6 years. The Cronbach’s α for the overall QOL-CS-K was 0.90, and the α coefficients for each subscale ranged from 0.73 to 0.83. The test and retest reliability was 0.88. Moderate correlations were found between comparable subscales of the QOL-CS-K and subscales of the EORTC QLQ-C30 (r=0.51-0.55) except for the spiritual well-being subscale of the QOL-CS-K, which did not correlate with any of the EORTC QLQ-C30 subscales (–0.08 to 0.16). CONCLUSION: The QOL-CS-K is a reliable and valid scale for measuring the QOL in long-term lymphoma survivors.

First detection and genetic characterization of porcine parvovirus 7 from Korean domestic pig farms

Porcine parvovirus 7 (PPV7) was first detected in Korean pig farms in 2017. The detection rate of PPV7 DNA was 24.0% (30/125) in aborted pig fetuses and 74.9% (262/350) in finishing pigs, suggesting that PPV7 has circulated among Korean domestic pig farms. Phylogenetic analysis based on capsid protein amino acid sequences demonstrated that the nine isolated Korean strains (PPV-KA1-3 and PPV-KF1-6) were closely related to the previously reported USA and Chinese PPV7 strains. In addition, the Korean strains exhibit genetic diversity with both insertion and deletion mutations. This study contributes to the understanding of the molecular epidemiology of PPV7 in Korea.

Discomfort related to Peripherally Inserted Central Catheters in Cancer Patient

PURPOSE: This study aimed to assess the discomfort and factors influencing the discomfort of cancer patients with peripherally inserted central catheters (PICC). METHODS: A cross-sectional survey was conducted at a tertiary university-based hospital in Seoul in 2013. Subjects were eligible if patients were diagnosed with cancer and four weeks had passed since the PICC was inserted. Anxiety was assessed using the Hospital Anxiety and Depression Scale (HADS) and discomfort was assessed with 8 questions developed through qualitative interviews and a literature review. Questions were about pain, interruption of daily activity or leisure, satisfaction, usefulness and feelings towards the PICC. RESULTS: Total 111 patients participated in the study. Over 75% of patients reported annoyance with PICC line. There was low positive correlation between discomfort due to PICC and anxiety. In anxious patients, patients discomfort was significantly higher than that of non-anxious patients. Significant factors influencing discomfort were gender, age, education level, PICC complications and anxiety. CONCLUSION: Patient engagement in selecting the type of catheter and individualized care considering the level of anxiety and patient demographics might help to reduce discomfort in cancer patients.

Recent Progress in Understanding the Conformational Mechanism of Heterotrimeric G Protein Activation

Heterotrimeric G proteins are key intracellular coordinators that receive signals from cells through activation of cognate G protein-coupled receptors (GPCRs). The details of their atomic interactions and structural mechanisms have been described by many biochemical and biophysical studies. Specifically, a framework for understanding conformational changes in the receptor upon ligand binding and associated G protein activation was provided by description of the crystal structure of the β2-adrenoceptor-Gs complex in 2011. This review focused on recent findings in the conformational dynamics of G proteins and GPCRs during activation processes.

Cytomegalovirus Infection under a Hybrid Strategy in Pediatric Liver Transplantation: A Single-Center Experience / 대한소아소화기영양학회지

PURPOSE: To evaluate the outcomes of a hybrid prophylactic strategy to prevent cytomegalovirus (CMV) disease in pediatric liver transplantation (LT) patients. METHODS: CMV DNAemia was regularly monitored by quantitative nucleic acid amplification test (QNAT) and was quantified in all children. CMV infection and disease were defined according to the International Consensus Guidelines. The hybrid strategy against CMV infection consisted of universal 3-week prophylaxis and preemptive treatment of intravenous ganciclovir regardless of the recipient's serostatus. RESULTS: A total of 143 children who underwent living donor LT were managed using the hybrid strategy. The overall incidence of CMV infection by QNAT was 48.3% (n=69/143). The highest CMV DNAemia positivity was observed in 49.2% (n=60/122) of children in the D+/R+ group, followed by 46.7% (n=7/15) in the D+/R− group. CMV disease was noted in 26.1% (n=18/69) patients. Forty-three (62.3%) children had undergone preemptive therapy consisting of intravenous ganciclovir. No symptomatic patients developed tissue-invasive disease, resulting in no CMV-associated mortality. CONCLUSION: The incidence of CMV infection was high in pediatric LT patients despite the hybrid strategy. However, tissue-invasive disease in pediatric LT did not occur.

Quality of Life and Physical Ability Changes After Hospital-Based Cardiac Rehabilitation in Patients With Myocardial Infarction

OBJECTIVE: To evaluate the effect of hospital-based cardiac rehabilitation (CR) on quality of life (QOL) and physical ability in patients with myocardial infarction (MI). METHODS: Patients with MI who were referred to the Cardiac Health and Rehabilitation Center 2 weeks after percutaneous coronary intervention were divided into CR and non-CR groups. The CR group performed supervised exercises 3 times a week for 2 months. QOL assessment, using the 36-item Short-Form Health Survey (SF-36) and physical ability evaluation were performed at the beginning and end of CR. RESULTS: The CR group demonstrated statistically significant improvements in physical functioning (PF), physical role functioning (RP), bodily pain (BP), general health perceptions (GH), vitality (VT), social role functioning (SF), emotional role functioning (RE), mental health (MH), physical component summary (PCS), and mental component summary (MCS). The non-CR group showed improvement in RP. Secondary outcomes, including resting heart rate (RHR), maximal oxygen consumption (VO(2max)), metabolic equivalent of task (MET), maximal exercise time (ET(max)), stage 3 Borg rating of perceived exertion (3RPE), maximal Borg rating of perceived exertion (RPEmax), and stage 3 rate pressure product (3RPP), improved in the CR group. The non-CR group showed improvements in VO(2max), MET, ET(max), and 3RPE. There were significant differences in improvements in PF, RP, BP, VT, SF, MH, MCS, RHR, VO(2max), MET, ET(max), 3RPE, and 3RPP between the two groups. CONCLUSION: Male patients with MI demonstrated improvements in QOL and physical ability following hospital-based CR; the impact on the mental component was greater than that on the physical component.

Vitamin D deficiency in children aged 6 to 12 years: single center's experience in Busan

PURPOSE: This study investigated the prevalence and risk factors associated with vitamin D deficiency in children. METHODS: We analyzed the medical records of 330 patients from the age of 6 to 12, who visited the endocrinology clinic of the Department of Pediatrics at Pusan National University Hospital, from September, 2013 to May, 2014. According to their serum 25-hydroxyvitamin D (25(OH)D) levels, the patients were grouped into either the deficiency group (25(OH)D<20 ng/mL), or the sufficiency group (25(OH)D≥20 ng/mL). The differences between the 2 groups were compared. RESULTS: There were 195 patients (59.1%) who had vitamin D deficiency. Their mean serum 25(OH)D level was 14.86±3.20 ng/mL. The differences in sex, age, and pubertal status between the 2 groups were not statistically significant. Weight standard deviation score (SDS), and body mass index SDS, were significantly higher in the vitamin D deficiency group (P=0.002 for each), compared to the sufficiency group. Compared with Autumn, both Spring (odds ratio [OR], 9.7; 95% confidence interval [CI], 4.3–22.0), and Winter (OR, 5.9; 95% CI, 3.5–10.0), were risk factors for vitamin D deficiency. In multiple logistic regression analysis, only seasonal differences have been confirmed to have an effect on vitamin D deficiency. CONCLUSION: Vitamin D deficiency in children aged 6 to 12 years is very common. Spring and Winter are the most important risk factors for vitamin D deficiency. We suggest that it is necessary to supplement the guideline for the vitamin D intake according to our situation.

Vitamin D deficiency in children aged 6 to 12 years: single center's experience in Busan

PURPOSE: This study investigated the prevalence and risk factors associated with vitamin D deficiency in children. METHODS: We analyzed the medical records of 330 patients from the age of 6 to 12, who visited the endocrinology clinic of the Department of Pediatrics at Pusan National University Hospital, from September, 2013 to May, 2014. According to their serum 25-hydroxyvitamin D (25(OH)D) levels, the patients were grouped into either the deficiency group (25(OH)D<20 ng/mL), or the sufficiency group (25(OH)D≥20 ng/mL). The differences between the 2 groups were compared. RESULTS: There were 195 patients (59.1%) who had vitamin D deficiency. Their mean serum 25(OH)D level was 14.86±3.20 ng/mL. The differences in sex, age, and pubertal status between the 2 groups were not statistically significant. Weight standard deviation score (SDS), and body mass index SDS, were significantly higher in the vitamin D deficiency group (P=0.002 for each), compared to the sufficiency group. Compared with Autumn, both Spring (odds ratio [OR], 9.7; 95% confidence interval [CI], 4.3–22.0), and Winter (OR, 5.9; 95% CI, 3.5–10.0), were risk factors for vitamin D deficiency. In multiple logistic regression analysis, only seasonal differences have been confirmed to have an effect on vitamin D deficiency. CONCLUSION: Vitamin D deficiency in children aged 6 to 12 years is very common. Spring and Winter are the most important risk factors for vitamin D deficiency. We suggest that it is necessary to supplement the guideline for the vitamin D intake according to our situation.