Table 2. Results of this meta-analysis.
| No. of study | OR (95% CI) | P Value | I2 (%) | P Value | |
|---|---|---|---|---|---|
| CVD | 10 | 1.30 (1.09-1.56) | 0.004 | 40 | 0.09 |
| Study design | |||||
| CC | 5 | 1.79 (1.16-2.77) | 0.009 | 48 | 0.11 |
| PC | 3 | 1.20 (1.06-1.37) | 0.005 | 0 | 0.54 |
| RC | 2 | 0.91 (0.60-1.40) | 0.68 | 0 | 0.50 |
| Type of CVD | |||||
| CHD | 5 | 1.44 (1.13-1.84) | 0.004 | 59 | 0.04 |
| MI | 5 | 1.01 (0.68-1.51) | 0.95 | 0 | 0.53 |
| Sample size | |||||
| More than 1000 subjects | 4 | 1.18 (1.04-1.34) | 0.01 | 0 | 0.52 |
| Less than 1000 subjects | 6 | 1.64 (1.12-2.41) | 0.01 | 48 | 0.09 |
CC, case-control study; PC, prospective cohort study; RC, retrospective cohort study; CVD, cardiovascular disease; CHD, coronary heart disease; MI, myocardial infarction