Sample size: how many participants are needed in a cohort study?This Endgames article ( BMJ 2014;349:g6557, doi:10.1136/bmj.g6557) contains an error in the last sentence …BMJdoi:10.1136/bmj.g6806None
How many VI acts have you had in the past week with (a) clients and (b) non-paying partners? Was a condom used throughout your last VI act with (a) a client and (b) a non-paying partner How many AI acts have you had in the past week with (a) clients and (b) non-paying ...
Researchers estimated the prevalence of pertussis infection in school age children after implementation of the preschool pertussis booster vaccination in the UK in October 2001. A prospective cohort study design was used. Children aged 5-15 years who presented with persistent cough in primary care were...
How Men Have (a) Sex 来自 highbeam.com 喜欢 0 阅读量: 70 作者: J Stoltenberg 摘要: In the human species, how many sexes are there? Answer A: There are two sexes. Answer B:...收藏 引用 批量引用 报错 分享 全部来源 求助全文 highbeam.com questia.com 相似文献...
cohorts: the first enrolled patients with newly diagnosed heart failure discharged from 103 hospitals between April 1999 and March 2001 ('the hospital discharge cohort'); the second enrolled patients seen in a specialized clinic between August 2003 and January 2004 ('the specialty clinic cohort')....
how many steps you currently take in a day, or in a week on average. From there, you can assess if you’re currently at 3,000 steps per day, progress to 4,000 etc. The key is to treat it like any other progression in the gym. You can work up to a higher target over time....
How Many in Mainline? Categories Vary in Surveys Americans who identify with mainline churches make up either 18 percent of the U.S. population... J Dart - How Many in Mainline? Categories Vary in Surveys 被引量: 0发表: 2009年 Social Capital, Too Much of a Good Thing? American ...
Results of a catch-up study. it may constitute a mild vulnerability factor for further development, nocturnal enuresis had a good long-term outcome in a cohort of treated subjects.doi... P Brieger,S Sommer,R Blöink,... - 《European Psychiatry》 被引量: 16发表: 2001年 A STUDY OF ...
et al. Analysis of risk factors for abdominal aortic aneurysm in a cohort of more than 3 million individuals. J. Vasc. Surg. 52, 539-548 Abdominal aortic aneurysm (AAA) disease is an insidious condition with an 85% chance of death after rupture. Ultrasound screening can reduce mortality, ...
I want to share with you another cohort analysis example! This time we used stacked bar charts to look at sales pipeline data. Each bar shows how many leads are at each stage of the funnel for a specific time frame: (*cohorts are defined by months of acquisition): ...