- Subgroup analyses for the risk ratios of posterior subcapsular opacity.
| Subgroups | No. of studies | Risk ratio (95% CI) | P-values | Heterogeneity | ||
|---|---|---|---|---|---|---|
| Chi2 | I2 | P-values | ||||
| Study design | ||||||
| Cohort | 7 | 3.20 (2.28-4.49) | <0.0001 | 6.69 | 10% | 0.35 |
| Cross-sectional | 3 | 3.53 (1.70-7.31) | 0.0007 | 2.11 | 5% | 0.35 |
| Radiation dose | ||||||
| <1 Sv | 2 | 1.36 (0.48-3.82) | 0.57 | 0.31 | 0% | 0.58 |
| ≥1 Sv | 6 | 3.38 (2.37-4.82) | <0.0001 | 5.25 | 5% | 0.39 |
| Study period | ||||||
| Before 2015 | 6 | 3.33 (2.37-4.68) | <0.0001 | 3.15 | 0% | 0.68 |
| After 2015 | 4 | 2.95 (1.42-6.11) | 0.004 | 5.44 | 45% | 0.14 |
| Occupational work | ||||||
| Physicians (radiologists, interventional radiologists, cardiologists, and surgeons) | 1 | 2.29 (0.26-19.97) | 0.45 | ND | ND | ND |
| Interventional cardiologists | 9 | 3.85 (2.79-5.30) | <0.0001 | 9.60 | 17% | 0.29 |
| Technicians | 2 | 2.08 (0.96-4.50) | 0.06 | 0.14 | 0% | 0.70 |
| Nurses | 3 | 4.00 (1.41-11.30) | 0.009 | 2.73 | 17% | 0.30 |
| Technicians and nurses | 2 | 2.88 (1.75-4.72) | <0.0001 | 2.73 | 63% | 0.10 |
No.: number, CI: confidence interval, Chi2: Chi-square test, Sv: stroke volume, ND: not defined