Pooled OR and 95% (CI) of premenstrual syndrome and any intake of alcohol
Number of studies | OR (95% CI) Fixed effects | OR (95% CI) Random effects | Ri* | Q test P values | |
All studies | 19 | 1.31 (1.28 to 1.35) | 1.45 (1.17 to 1.79) | 0.98 | 0.0001 |
Case-control studies | 7 | 1.27 (1.14 to 1.41) | 1.66 (1.04 to 2.64) | 0.93 | 0.0001 |
Cross-sectional studies | 11 | 1.67 (1.60 to 1.74) | 1.40 (1.00 to 1.94) | 0.98 | 0.0001 |
Direct calculations | 17 | 1.31 (1.28 to 1.35) | 1.51 (1.22 to 1.88) | 0.98 | 0.0001 |
Quality score ≥3 | 10 | 1.11 (1.07 to 1.14) | 1.22 (1.05 to 1.42) | 0.90 | 0.0003 |
Quality score <3 | 9 | 1.73 (1.66 to 1.80) | 1.50 (1.03 to 2.20) | 0.98 | 0.0001 |
Full adjustment | 7 | 1.10 (1.07 to 1.14) | 1.18 (1.01 to 1.38) | 0.90 | 0.005 |
Incomplete adjustment | 12 | 1.70 (1.63 to 1.77) | 1.47 (1.07 to 2.03) | 0.98 | 0.0001 |
Validated exposure | 11 | 1.09 (1.05 to 1.12) | 1.09 (0.99 to 1.20) | 0.77 | 0.006 |
Non validated exposure | 8 | 2.06 (1.96 to 2.16) | 1.91 (1.40 to 2.62) | 0.96 | 0.0001 |
Validated diagnosis | 12 | 1.85 (1.77 to 1.94) | 1.38 (0.99 to 1.92) | 0.97 | 0.0001 |
Non validated diagnosis | 7 | 1.10 (1.07 to 1.14) | 1.38 (1.16 to 1.65) | 0.95 | 0.0001 |
High response rate | 5 | 1.16 (1.05 to 1.28) | 1.36 (0.99 to 1.88) | 0.86 | 0.003 |
Low response rate | 14 | 1.32 (1.29 to 1.36) | 1.46 (1.13 to 1.89) | 0.98 | 0.0001 |
Defined target population | 12 | 1.10 (1.07 to 1.13) | 1.20 (1.07 to 1.36) | 0.86 | 0.0001 |
Undefined target population | 7 | 2.05 (1.95 to 2.15) | 1.65 (1.02 to 2.67) | 0.99 | 0.0001 |
US studies | 12 | 1.63 (1.57 to 1.70) | 1.56 (1.17 to 2.08) | 0.98 | 0.0001 |
Rest of the world | 7 | 1.10 (1.06 to 1.14) | 1.24 (0.89 to 1.72) | 0.98 | 0.0001 |
*Proportion of total variance due to between-study variance.