Table 1.
Summary of the six selected articles
| Study design | First author | Year of publication | Inclusion periods | Cases (medication/total) | Controls (medication/total) | ES (95% CI) |
|---|---|---|---|---|---|---|
| Case-control | Do MH [27] | 2001 | Dec 1997-Aug 1999 | 9/48 | 8/54 | 1.327 (0.467, 3.768) |
| Do MH1 [28] | 2007 | Sep 1999-Aug 2003 | 14/152 | 30/304 | 0.927 (0.476, 1.805) | |
| Kim MK1 [31] | 2008 | Oct 2004-Jun 2006 | 42/127 | 41/127 | 1.036 (0.613, 1.751) | |
| Cho YA1 [32] | 2010 | Jul 2007-Sep 2008 | 28/142 | 54/142 | 0.400 (0.235, 0.683) | |
| Kim BK [30] | 2014 | Feb 1995-Dec 2011 | 43/102 | 50/204 | 2.245 (1.353, 3.724) | |
| Cohort | Park SB [25] | 2012 | Jan 1998-Jun 2004 | 26/61082 | 13/34712 | 1.015 (0.797, 1.292) |
ES, effect size; CI, confidence interval.
1
Modified based on correspondence with author.
2
Number of incident cases in medication group vs. non-medication group.