HR (95% CI) for specific unintentional injuries by IQ
| IQ score | n (injury/no injury) | Adjusted for age | Multiple adjustment* (excluding education) | Multiple adjustment† (including education) |
| Falling | ||||
| 7–9 | 17 006/269 503 | 1.00 | 1.00 | 1.00 |
| 5/6 | 32 027/411 485 | 1.24 (1.22 to 1.27) | 1.19 (1.17 to 1.21) | 1.13 (1.11 to 1.16) |
| 3/4 | 23 818/251 188 | 1.45 (1.42 to 1.48) | 1.35 (1.32 to 1.38) | 1.26 (1.23 to 1.29) |
| 1/2 | 9855/94 593 | 1.59 (1.55 to 1.63) | 1.46 (1.42 to 1.50) | 1.35 (1.31 to 1.39) |
| P‡ | <0.001 | <0.001 | <0.001 | |
| SD decrease | 82 706/1 026 769 | 1.17 (1.16 to 1.18) | 1.14 (1.13 to 1.15) | 1.11 (1.10 to 1.12) |
| p Value | <0.001 | <0.001 | <0.001 | |
| Road accident | ||||
| 7–9 | 9088/277 421 | 1.00 | 1.00 | 1.00 |
| 5/6 | 17 611/425 901 | 1.27 (1.23 to 1.30) | 1.14 (1.11 to 1.17) | 1.00 (0.97 to 1.03) |
| 3/4 | 13 805/261 201 | 1.54 (1.50 to 1.58) | 1.33 (1.30 to 1.37) | 1.09 (1.06 to 1.12) |
| 1/2 | 6695/97 753 | 1.99 (1.93 to 2.06) | 1.65 (1.60 to 1.71) | 1.30 (1.25 to 1.35) |
| p Value‡ | <0.001 | <0.001 | <0.001 | |
| SD decrease | 47 199/1 062 276 | 1.25 (1.23 to 1.26) | 1.18 (1.16 to 1.19) | 1.09 (1.07 to 1.10) |
| p Value | <0.001 | <0.001 | <0.001 | |
| Poisoning | ||||
| 7–9 | 856/285 653 | 1.00 | 1.00 | 1.00 |
| 5/6 | 2021/441 491 | 1.58 (1.46 to 1.71) | 1.42 (1.31 to 1.54) | 1.18 (1.09 to 1.29) |
| 3/4 | 1997/273 009 | 2.40 (2.22 to 2.60) | 2.00 (1.84 to 2.18) | 1.51 (1.38 to 1.65) |
| 1/2 | 1147/103 301 | 3.65 (3.34 to 3.99) | 2.80 (2.54 to 3.08) | 1.99 (1.80 to 2.20) |
| p Value‡ | <0.001 | <0.001 | <0.001 | |
| SD decrease | 6021/1 103 454 | 1.53 (1.49 to 1.57) | 1.41 (1.37 to 1.45) | 1.28 (1.24 to 1.31) |
| p Value | <0.001 | <0.001 | <0.001 | |
| Fire | ||||
| 7–9 | 484/286 025 | 1.00 | 1.00 | 1.00 |
| 5/6 | 1117/442 395 | 1.50 (1.35 to 1.67) | 1.33 (1.19 to 1.49) | 1.16 (1.03 to 1.30) |
| 3/4 | 908/274 098 | 1.92 (1.71 to 2.14) | 1.57 (1.39 to 1.76) | 1.27 (1.12 to 1.43) |
| 1/2 | 458/103 990 | 2.55 (2.25 to 2.90) | 1.97 (1.71 to 2.25) | 1.53 (1.32 to 1.77) |
| p Value‡ | <0.001 | <0.001 | <0.001 | |
| SD decrease | 2967/1 106 508 | 1.36 (1.31 to 1.41) | 1.25 (1.20 to 1.30) | 1.16 (1.11 to 1.21) |
| p Value | <0.001 | <0.001 | <0.001 | |
| Drowning | ||||
| 7–9 | 79/286 430 | 1.00 | 1.00 | 1.00 |
| 5/6 | 127/443 385 | 1.07 (0.81 to 1.42) | 1.02 (0.76 to 1.37) | 1.01 (0.74 to 1.36) |
| 3/4 | 92/274 914 | 1.21 (0.90 to 1.63) | 1.12 (0.81 to 1.55) | 1.10 (0.78 to 1.55) |
| 1/2 | 33/104 415 | 1.14 (0.76 to 1.71) | 0.99 (0.64 to 1.52) | 0.99 (0.63 to 1.56) |
| p Value‡ | 0.26 | 0.75 | 0.79 | |
| SD decrease | 331/1 109 144 | 1.05 (0.94 to 1.17) | 1.00 (0.89 to 1.13) | 1.00 (0.88 to 1.13) |
| p Value | 0.38 | 0.98 | 0.95 | |
| Medical complication | ||||
| 7–9 | 2964/283 545 | 1.00 | 1.00 | 1.00 |
| 5/6 | 5595/437 917 | 1.22 (1.17 to 1.28) | 1.19 (1.14 to 1.25) | 1.12 (1.06 to 1.17) |
| 3/4 | 4217/270 789 | 1.47 (1.41 to 1.54) | 1.38 (1.31 to 1.45) | 1.25 (1.18 to 1.31) |
| 1/2 | 1861/102 587 | 1.71 (1.61 to 1.81) | 1.58 (1.48 to 1.68) | 1.41 (1.32 to 1.50) |
| p Value‡ | <0.001 | <0.001 | <0.001 | |
| SD decrease | 14 637/1 094 838 | 1.20 (1.18 to 1.22) | 1.17 (1.15 to 1.19) | 1.13 (1.11 to 1.15) |
| p Value | <0.001 | <0.001 | <0.001 | |
↵* Adjusted for age, conscription centre, year of birth, childhood SES, adult height, BMI, systolic blood pressure, and adult SES.
↵† Adjusted for age, conscription centre, year of birth, childhood SES, adult height, BMI, systolic blood pressure, adult SES, and educational attainment.
↵‡ p for trend across four categories of IQ score.