Sentences with phrase «performed stratified analysis»

For various cancer sites, we performed stratified analysis on cancer types which had more than two cohorts.

To minimize the confounding effect and test for potential modification by an overall lifestyle pattern, we further performed a stratified analysis according to a priori — defined healthy lifestyle pattern, as characterized by never smoking or ever smoking for fewer than 5 pack - years, never or moderate alcohol intake (< 14 g / d in women and < 28 g / d in men), body mass index (calculated as weight in kilograms divided by height in meters squared) of at least 18.5 and less than 25.0, and physical activity of at least 150 min / wk at a moderate level or at least 75 min / wk at a vigorous level (equivalent to ≥ 7.5 metabolic equivalent h / wk) as recommended.18 Likewise, given the previous report that protein intake was associated with a higher risk for diabetes - related mortality, 8 we examined the protein - mortality association according to the history of diabetes.

Not exact matches

To further explore the apparent relation between sleep position and ear infections at 6 months, the age at which this outcome was most common, we performed analyses stratified independently by maternal ethnicity, breastfeeding, and season.

To assess the robustness of the results of our regression analysis, we performed covariate adjustment with derived propensity scores to calculate the absolute risk difference (details are provided in the Supplementary Appendix, available with the full text of this article at NEJM.org).14, 15 To calculate the adjusted absolute risk difference, we used predictive margins and G - computation (i.e., regression - model — based outcome prediction in both exposure settings: planned in - hospital and planned out - of - hospital birth).16, 17 Finally, we conducted post hoc analyses to assess associations between planned out - of - hospital birth and outcomes (cesarean delivery and a composite of perinatal morbidity and mortality), which were stratified according to parity, maternal age, maternal education, and risk level.

To determine whether the presence and strength of the associations between individual risk factors and severe PPH vary among women undergoing prelabor CD or intrapartum CD, stratified analyses are needed according to CD subtype.To identify risk factors for severe PPH within 2 distinct CD populations, prelabor CD and intrapartum CD, we performed 2 case - control studies.

Data analysis was performed using Cox proportional hazard models adjusted for age, sex, calendar year, comorbidity, medical treatment, and severity of disease, and propensity - based risk - stratified models and case - crossover models.