Case-series analysis for sulphonylureas: association between exposure to any sulphonylurea and fractures.

aTest for trend p = 0.50; sum of patient years and number of fractures in analysis stratified by exposure duration is less than in the main analysis as follow up censored at 7 y in stratified analysis.

趋势检验的P值为0.50；按暴露时长分层的分析中，患者人年总数与骨折例数均少于主分析，这是由于该分层分析将随访截尾至7年。