Table 3.
Subgroup analyses of CT exposure radiation and the risks of cancer incidence
| n | OR (95% CI) | I [2](%), Pheterogeneity | Psubgroup | |
|---|---|---|---|---|
| All studies | 25 | 5.98 (3.46 to 10.35) | 99.61, 0.00 | |
| Sex | 0.71 | |||
| Men | 18 | 4.89 (2.40 to 9.96) | 99.43, 0.00 | |
| Women | 18 | 5.88 (2.96 to 11.68) | 99.52, 0.00 | |
| Age | 0.93 | |||
| < 45 years | 11 | 5.79 (2.08 to 16.14) | 99.64, 0.00 | |
| 45 to 65 years | 11 | 5.04 (2.02 to 12.57) | 99.47, 0.00 | |
| > 65 years | 8 | 6.66 (2.07 to 21.38) | 98.00, 0.00 | |
| Scanning year | 0.88 | |||
| Before 2007 | 8 | 3.83 (1.05 to 13.91) | 98.86, 0.00 | |
| After 2007 | 5 | 3.39 (1.60 to 7.72) | 99.54, 0.00 | |
| Data type | 0.00,0.00 | |||
| Actual | 6 | 1.17 (0.89 to 1.55) | 94.18, 0.00 | |
| Actual (Except Burton et al. 2018) | 5 | 1.32 (1.11 to 1.56) | 80.79, 0.00 | |
| Estimate | 19 | 10.00 (5.87 to 17.05) | 99.14, 0.00 | |
| Country | 0.19 | |||
| NonAmerica | 14 | 4.65 (2.15 to 10.05) | 99.73, 0.00 | |
| America | 12 | 9.56 (4.48 to 20.40) | 99.03, 0.00 | |
| Continent | 0.58 | |||
| Asia | 5 | 7.81 (1.57 to 38.89) | 99.91, 0.00 | |
| Europe | 8 | 4.37 (2.00 to 9.56) | 98.74, 0.00 | |
| America | 14 | 7.72 (3.42 to 17.42) | 99.19, 0.00 | |
| Cancer type | 0.01 | |||
| Nonleukemia | 14 | 5.57 (2.36 to 13.16) | 99.67, 0.00 | |
| Leukemia | 5 | 1.66 (1.29 to 2.15) | 19.62, 0.21 | |
| CT scan sites | 0.00 | |||
| < 3 | 15 | 3.38 (1.80 to 6.33) | 99.23, 0.00 | |
| ≥ 3 | 10 | 14.08 (6.60 to 30.05) | 99.53, 0.00 | |
| Quality scores | 0.25 | |||
| < 5 | 14 | 8.04 (4.38 to 14.75) | 99.23, 0.00 | |
| ≥ 5 | 11 | 4.12 (1.57 to 10.86) | 99.69, 0.00 | |
Abbreviations: OR Odds ratio, CI Confidence interval