Methods of competing risks flexible parametric modeling for estimation of the risk of the first disease among HIV infected men.

BACKGROUND: Patients infected with the Human Immunodeficiency Virus (HIV) are susceptible to many diseases. In these patients, the occurrence of one disease alters the chance of contracting another. Under such circumstances, methods for competing risks are required. Recently, competing risks analyses in the scope of flexible parametric models have risen to address this requirement. These lesser-known analyses have considerable advantages over conventional methods. METHODS: Using data from Multi Centre AIDS Cohort Study (MACS), this paper reviews and applies methods of competing risks flexible parametric models to analyze the risk of the first disease (AIDS or non-AIDS) among HIV-infected patients. We compared two alternative subdistribution hazard flexible parametric models (SDHFPM1 and SDHFPM2) with the Fine & Gray model. To make a complete inference, we performed cause-specific hazard flexible parametric models for each event separately as well. RESULTS: Both SDHFPM1 and SDHFPM2 provided consistent results regarding the magnitude of coefficients and risk estimations compared with estimations obtained from the Fine & Gray model, However, competing risks flexible parametric models provided more efficient and smoother estimations for the baseline risks of the first disease. We found that age at HIV diagnosis indirectly affected the risk of AIDS as the first event by increasing the number of patients who experience a non-AIDS disease prior to AIDS among > 40 years. Other significant covariates had direct effects on the risks of AIDS and non-AIDS. DISCUSSION: The choice of an appropriate model depends on the research goals and computational challenges. The SDHFPM1 models each event separately and requires calculating censoring weights which is time-consuming. In contrast, SDHFPM2 models all events simultaneously and is more appropriate for large datasets, however, when the focus is on one particular event SDHFPM1 is more preferable.

Effectiveness of an In-Service Education Program to Improve Patient Safety Directed at Surgical Residents: A Randomized Controlled Trial.

BACKGROUND: Patient safety is a critical issue in healthcare services particularly in surgical units and operation rooms because of the high prevalence and risk of medical errors in such settings. This study was conducted to determine whether a 1-day educational intervention can change the attitude and behavior of surgical residents regarding patient safety. METHODS: A total of 90 surgical residents were recruited from 6 university hospitals located in Tehran and Qazvin, Iran, and were randomized to either the intervention or a control group. Those in the intervention group participated in a 1-day workshop on patient safety, whereas the control group received no intervention. Both groups were followed for 3 months after the intervention was completed. The Safety Attitude Questionnaire and Oxford Non-Technical Skills scale were administered at 3 points in time (baseline, 1 month after the intervention, and 3 month later). The data were analyzed using repeated measures analysis of variance. RESULTS: Total score on the Safety Attitude Questionnaire improved from 54.5 (SD = 14.4) at baseline to 58.3 (SD = 13.8) 3 months after the intervention in the intervention group; all dimensions, with the exception of working condition, showed significant changes. In addition, the Oxford Non-Technical Skills scale - as assessed by attending surgeons - improved significantly in all domains (p < 0.05). More than 60% of participants in the intervention group scored in the positive range for items assessing safety and teamwork climate. CONCLUSIONS: A 1-day interactive educational workshop may be effective in changing the attitude and practice of surgical residents regarding patient safety. Further assessment of this intervention in other healthcare settings involving health professionals from various specialties and use of an objective measure such as number of reported medical errors are needed to corroborate these findings.

Estimating the Net Survival of Patients with Gastric Cancer in Iran in a Relative Survival Framework.

BACKGROUND: Iran is an Eastern Mediterranean region country with the highest rate of gastric cancer. The present study aimed to evaluate the 5-year net survival of patients with gastric cancer in Iran using a relative survival framework. METHODS: In a cross-sectional study, using life-table estimation of relative survival, we reported 1- to 5-year relative survival regarding age, sex, disease stage, pathology, and adjuvant therapies via modeling excess mortality. All the analyses were done applying Stata 11.2 with a confidence level of 95%. RESULTS: Data on 330 patients (aged 32-96 y), who were comprised of 228 (69.1%) men and 102 (30.1%) women with gastric cancer and were followed up for 10 years, were analyzed. Adenocarcinoma was the most common malignancy (281 [85.2%] patients), and 248 (75.1%) patients were at stage 3 or stage 4. The 1- and 5-year net survival rates after surgery were 67.96 (95% CI: 62.35-72.98) and 23.35 (95% CI: 17.94-29.28), respectively. Higher stages (P=0.001), older ages (P=0.007), and less use of adjuvant therapies (P<0.001) were independently associated with excess mortality. CONCLUSION: It is recommended to use the relative survival framework to analyze the survival of cancer patients as an alternative approach not only to eliminate biases due to competing risks and their dependencies but also to estimate the cure at the population level concerning the most important individual characteristics. Our findings showed that the survival rate of gastric cancer in Iran is lower than that in most developed countries in terms of net survival.

Testing Psychometrics of Healthcare Empowerment Questionnaires (HCEQ) among Iranian Reproductive Age Women: Persian Version.

BACKGROUND: Producing high quality data needs an accurate measurement in any fields of study. This study aimed to test psychometrics of the Persian version Healthcare Empowerment Questionnaire (HCEQ) in relation to personal care among Iranian reproductive age women and to validate the instrument for future use. METHODS: A cross-sectional study was conducted on 549 reproductive age women in a health centers affiliated to Tehran University of Medical Sciences producing a response rate of 100%. Content validity was established using translation and backtranslation procedures, pilot testing, and getting views of expert panel. Construct validity was measured using explanatory factor analysis. Cronbach's alpha was used to measure internal consistency, and intra-class correlation coefficients were used to confirm stability. RESULTS: The results indicated that explanatory factor analysis of 10 items in three dimensions explained 63.2% of the total variance. Validity and reliability of the 10-items of HCEQ with two response scales (perception of control and motivation of being empowered) assessed for internal quality showed the reliability of internal consistency (α=0.70; range=0.62-0.76). The correlation between convert (10 items) and apparent (3 factors) variables was 0.5 times higher than the revealed convergent validity. CONCLUSION: The findings of this study supported the reliability and validity of the Persian version of HCEQ to assess the degree of individual empowerment in relation to personal healthcare and services among reproductive age women. Therefore, the HCEQ-Persian version could be a useful, comprehensive, and culturally sensitive scale for assessing healthcare empowerment among reproductive age women.

Reliability and Validity of Kurdish Language Version of Health Promoting Lifestyle Profile II among Kurdish Healthcare Providers Kurdish Version of HPLP-II.

BACKGROUND: Unhealthy lifestyles pose significant threat to public health. This study aimed to assess the validity and reliability of a Kurdish version of the HPLP-II instrument among Kurdish healthcare providers, whose society and culture differ from that of North America and Spain, where the instrument was developed. METHODS: The instrument was translated into Kurdish, back translated, and pilot tested to ascertain cultural sensitivity. It was then evaluated using a convenience sample of 460 healthcare providers in the Kurdistan region, northern Iraq using a principal components factor analysis. RESULTS: The order of factors was entirely identical to those isolated previously during the psychometric assessment of the English language version. The majority of our study participants were male (55%). In addition, 39.2% of participants were nurses. In addition, 42% of participants had less than five years of working experience. Furthermore, 82.1% of our study population held a high school diploma. The mean (SE) of Physical Activities dimension was low (15.3 ± 4.8) compared to Spiritual Growth dimension (24.5 ± 4.4). Moreover, the Cronbach's alpha coefficient for the overall HPLP-II questionnaire was 0.870; however, the nutrition dimension was low (0.622) compared to Physical Activities dimension (0.792). Furthermore, the correlation between items ranged from 0.099 to 0.611. CONCLUSIONS: The Kurdish version of the HPLP-II demonstrated initial reliability and validity. It is a precious tool to evaluate and assess lifestyle and lifestyle interventions built to improve the health of Kurds.

Nitrous oxide/oxygen compared with fentanyl in reducing pain among adults with isolated extremity trauma: a randomized trial.

OBJECTIVE: To compare the effectiveness of nitrous oxide/oxygen (N(2)O/O(2)) and fentanyl in relieving pain among patients with an isolated long bone fracture or main joint dislocation of the limbs. METHODS: Patients with isolated long bone fracture or main joint dislocation with moderate to severe pain were randomized into two groups. For the first group, nitrous oxide/oxygen (50:50) was self-administered until pain relief was achieved up to a maximum of 15 min. Fentanyl (2 µg/kg) as a single dose was administered for the second group. Pain intensity was measured with a visual analogue scale before and at minutes three, six and nine after the start of the drug administration. We also recorded observed adverse effects in these two groups. RESULTS: One hundred patients were enrolled in the study. No statistically significant difference in pain score was detected between the two groups with one exception. The mean visual analogue scale scores at 9 min were 2.2 and 3.1 for nitrous oxide/oxygen and fentanyl, respectively (difference -0.9 [95% CI -1.7- -0.1]) (P=0.006). There was no statistically significant difference between two groups regarding adverse effects. CONCLUSIONS: Neither nitrous oxide/oxygen or fentanyl appeared to be superior to the other in relieving moderate to severe pain among emergency patients presenting with isolated limb fracture or dislocation. In an ED, increased use of nitrous oxide might reduce the overall need for opiate analgesia, and in our setting, the need for constant monitoring.