Sentences with phrase «stratified analysis using»

Ecker BL, Paulson EC, Datta J, Jeganathan AN, Aarons C, Kelz RR, Mahmoud NN: Lymph node identification following neoadjuvant therapy in rectal cancer: A stage - stratified analysis using the surveillance, epidemiology, and end results (SEER)- Medicare database Journal of Surgical Oncology 112 (4): 415 - 420,2015.

Not exact matches

Stratified analysis allowed us to examine the effects of bottle use and breastmilk feeding separately.

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.

For instance, it has been suggested that the physical restraint associated with swaddling may prevent infants placed supine from rolling to the prone position.299 One study's results suggested a decrease in SIDS rate with swaddling if the infant was supine, 182 but it was notable that there was an increased risk of SIDS if the infant was swaddled and placed in the prone position.182 Although a recent study found a 31-fold increase in SIDS risk with swaddling, the analysis was not stratified according to sleep position.171 Although it may be more likely that parents will initially place a swaddled infant supine, this protective effect may be offset by the 12-fold increased risk of SIDS if the infant is either placed or rolls to the prone position when swaddled.182, 300 Moreover, there is no evidence that swaddling reduces bed - sharing or use of unsafe sleep surfaces, promotes breastfeeding, or reduces maternal cigarette smoking.

There were also no clear differences in the association between statin use and outcomes in analyses stratified by age older or younger than 55, 60, 65, or 70 years, with very similar estimates from 7 trials (eTable 6 in the Supplement).14, 19,20,26,29,31,35 None of the trials that enrolled patients older than 75 years18, 20,22,23,27,29 reported results in this subgroup.

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.

I entirely agree with your suggestion to stratify any analysis considering the types of «carbohydrate» used in Jeff's studies.

The analyses were first conducted in each cohort separately, and because no appreciable difference was detected by cohort (eTable 1 in the Supplement), we then conducted the pooled analysis using the sex - stratified Cox proportional hazards regression model in the combined data set.

Furthermore, stratified analyses were conducted by hormonal contraceptive use (5, 59, 60) and treatment assignment.

We formally tested for mediation of the relation between IPV and obesity by maternal depression using a bootstrap method.49 Owing to theoretical and empirical data suggesting differing associations between family and neighborhood violence exposure and BMI by sex, additional stratified analyses were conducted and effect modification was tested using interaction terms.

When primary analyses were stratified by SES, odds ratios for excessive media exposure at 2 years (> 2 hours per day) appeared slightly stronger in lower SES families (aOR 1.23 [95 % CI 1.04 — 1.47]-RRB- than in high SES families (1.03 [0.80 — 1.32]-RRB-, when using the 9 - month ITSC predictor (P for interaction.33).