Table 3

Pooled OR (OR) and 95% (CI) of premenstrual syndrome and high intake of alcohol

Number of studiesOR (95% CI) Fixed effectsOR (95% CI) Random effectsRi*Q test P values
All studies131.71 (1.63 to 1.78)1.79 (1.39 to 2.32)0.960.0001
Case-control studies51.27 (1.10 to 1.47)2.48 (1.30 to 4.76)0.930.0001
Cross-sectional studies72.02 (1.91 to 2.12)1.76 (1.32 to 2.36)0.950.0001
Direct calculations121.91 (1.82 to 2.01)1.90 (1.45 to 2.49)0.950.0001
Quality score ≥381.20 (1.11 to 1.29)1.41 (1.14 to 1.74)0.810.001
Quality score <352.05 (1.95 to 2.16)2.33 (1.60 to 3.41)0.960.0001
Full adjustment61.17 (1.08 to 1.26)1.23 (1.03 to 1.48)0.720.03
Incomplete adjustment72.05 (1.95 to 2.16)2.25 (1.66 to 3.05)0.950.0001
Validated exposure71.18 (1.09 to 1.27)1.32 (1.06 to 1.64)0.810.003
Non validated exposure62.06 (1.95 to 2.17)2.25 (1.66 to 3.06)0.950.0004
Validated diagnosis71.95 (1.85 to 2.06)1.98 (1.31 to 3.00)0.980.0001
Non validated diagnosis61.26 (1.16 to 1.36)1.58 (1.22 to 2.05)0.860.001
High response rate41.23 (1.06 to 1.42)1.84 (1.07 to 3.17)0.910.001
Low response rate91.76 (1.68 to 1.84)1.80 (1.32 to 2.47)0.970.0001
Defined target population81.23 (1.15 to 1.32)1.45 (1.21 to 1.75)0.780.001
Undefined target population52.09 (1.98 to 2.21)2.49 (1.36 to 4.58)0.990.0001
US studies91.92 (1.83 to 2.02)1.91 (1.41 to 2.59)0.960.0001
Rest of the world41.19 (1.09 to 1.30)1.58 (0.95 to 2.63)0.960.001
  • *Proportion of total variance due to between-study variance.