Table.
Odds ratios (95% confidence interval) for all cause mortality and disability by birthweight and sex
| Age (years) | No of deaths/ with disability* | Birthweight (g)
|
P value for trend† | ||||
|---|---|---|---|---|---|---|---|
| <2500 (n=743) | 2500-3249 (n=3503) | 3250-3749 (n=5657) | 3750-4249 (n=4668) | >4249 (n=2111) | |||
| Mortality | |||||||
| Males: | |||||||
| <1 | 46 | 8.41 (2.03 to 34.7) | 4.51 (1.27 to 34.8) | 2.27 (0.63 to 8.18) | 1.58 (0.42 to 6.01) | 1.00 | <0.001 |
| 1-15 | 68 | 1.15 (0.31 to 4.25) | 1.07 (0.47 to 2.43) | 0.95 (0.45 to 2.02) | 1.01 (0.48 to 2.12) | 1.00 | 0.71 |
| 16-38 | 143 | 0.45 (0.13 to 1.51) | 1.23 (0.74 to 2.04) | 0.61 (0.36 to 1.03) | 0.77 (0.47 to 1.26) | 1.00 | 0.94 |
| Females: | |||||||
| <1 | 36 | 2.01 (0.27 to 14.9) | 2.94 (0.65 to 13.4) | 1.37 (0.29 to 6.44) | 1.62 (0.33 to 7.89) | 1.00 | 0.12 |
| 1-15 | 51 | 2.02 (0.39 to 10.4) | 2.11 (0.59 to 7.50) | 1.18 (0.33 to 4.27) | 2.31 (0.66 to 8.09) | 1.00 | 0.52 |
| 16-38 | 79 | 1.45 (0.45 to 4.70) | 1.09 (0.44 to 2.66) | 1.09 (0.47 to 2.56) | 1.22 (0.51 to 2.94) | 1.00 | 0.91 |
| Disability* | |||||||
| Males: | |||||||
| 7 | 403 (7005) | 1.78 (0.94 to 3.37) | 1.42 (1.00 to 2.01) | 1.24 (0.90 to 1.70) | 0.96 (0.69 to 1.34) | 1.00 | 0.02 |
| 16 | 541 (5746) | 1.51 (0.81 to 2.80) | 1.79 (1.32 to 2.42) | 1.18 (0.88 to 1.57) | 1.03 (0.76 to 1.38) | 1.00 | <0.001 |
| 23 | 197 (5017) | 3.65 (1.77 to 7.49) | 1.33 (0.80 to 2.22) | 1.03 (0.65 to 1.64) | 1.20 (0.76 to 1.89) | 1.00 | 0.09 |
| 33 | 212 (4387) | 2.32 (0.97 to 5.55) | 1.19 (0.72 to 1.98) | 1.30 (0.84 to 2.01) | 1.14 (0.73 to 1.78) | 1.00 | 0.15 |
| Females: | |||||||
| 7 | 274 (6672) | 2.35 (1.19 to 4.62) | 1.44 (0.88 to 2.37) | 1.32 (0.82 to 2.13) | 1.07 (0.64 to 1.77) | 1.00 | 0.001 |
| 16 | 392 (5545) | 0.71 (0.35 to 1.42) | 0.82 (0.56 to 1.19) | 0.90 (0.63 to 1.27) | 0.74 (0.51 to 1.08) | 1.00 | 0.41 |
| 23 | 158 (5267) | 2.24 (0.93 to 5.37) | 1.49 (0.80 to 2.75) | 1.01 (0.55 to 1.87) | 1.00 (0.52 to 1.89) | 1.00 | 0.02 |
| 33 | 242 (4741) | 2.06 (0.94 to 4.51) | 1.37 (0.80 to 2.36) | 1.28 (0.76 to 2.14) | 1.55 (0.91 to 2.63) | 1.00 | 0.17 |
*
Newly identified cases from school doctor and health visitor assessments of disabling “abnormal conditions” ages 7-16, and from individual reports of a limiting longstanding illness ages 23 and 33; the denominator is all those with data minus subjects with disability at any previous age.
†
Trend tests were performed with continuous measures of birthweight. The P values show the significance of linear trend except for disability at 7 for males, which has a quadratic trend.