Retrospective Cohort Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Aug 28, 2015; 21(32): 9588-9597
Published online Aug 28, 2015. doi: 10.3748/wjg.v21.i32.9588
Table 1 Patient characteristics before and after propensity score matching
Before matching
After matching
Cohort 1 (n = 14163)Cohort 2 (n = 16228)Cohort 1 (n = 13364)Cohort 2 (n = 13364)
Age (mean ± SD)b38.2 ± 12.639.6 ± 12.638.7 ± 12.638.9 ± 12.4
Male (%)b67.764.766.766.5
Insurance type (%)b
Medical insurance40.652.442.942.6
Out-of-pocket58.247.056.356.6
Others1.30.60.70.8
Disease statusb
Yes129.3%23.6%28.2%27.9%