Relative risk of fetal death from specific causes other than congenital anomalies, by father’s occupation, in infants born in the southern and eastern area who were conceived in April–September and in those conceived in the rest of the year, 1995–99
| Cause of death* and father’s occupation | Conceived in April–September | Conceived in rest of year | ||||||
|---|---|---|---|---|---|---|---|---|
| No. of fetal deaths | Rate per 1000 | Crude relative risk | Adjusted relative risk† | No. of fetal deaths | Rate per 1000 | Crude relative risk | Adjusted relative risk† | |
| *Codes 760–761 of the ICD-9 and P00–P01 of ICD-10 (diseases of the mother and complications of pregnancy), codes 762 of the ICD-9 and P02 of the ICD-10 (obstetrical complications), codes 768 of the ICD-9 and P20–P21 of the ICD-10 (hypoxia and asphyxia at birth) and codes 779 of the ICD-9 and P96.9 of the ICD-10 (poorly defined). | ||||||||
| †Adjusted for birth weight, infant’s sex, weeks of gestation, age, marital status, and mother’s economic activity. | ||||||||
| Diseases of the mother and complications of pregnancy | ||||||||
| Non-manual workers | 72 | 0.4 | 1.00 | 1.00 | 68 | 0.5 | 1.00 | 1.00 |
| Manual workers | 70 | 0.5 | 1.21 (0.87 to 1.67) | 1.16 (0.82 to 1.62) | 63 | 0.5 | 1.09 (0.78 to 1.54) | 0.95 (0.67 to 1.36) |
| Agricultural workers | 18 | 0.7 | 1.62 (0.97 to 2.71) | 1.62 (0.95 to 2.76) | 17 | 0.7 | 1.57 (0.92 to 2.67) | 1.40 (0.80 to 2.42) |
| Obstetrical complications | ||||||||
| Non-manual workers | 151 | 1.0 | 1.00 | 1.00 | 156 | 0.9 | 1.00 | 1.00 |
| Manual workers | 106 | 1.0 | 0.87 (0.68 to 1.12) | 0.72 (0.56 to 0.93) | 134 | 0.8 | 1.01 (0.80 to 1.28) | 0.87 (0.68 to 1.10) |
| Agricultural workers | 38 | 1.3 | 1.63 (1.14 to 2.32) | 1.24 (0.86 to 1.80) | 32 | 1.5 | 1.29 (0.88 to 1.88) | 1.03 (0.70 to 1.53) |
| Hypoxia and asphyxia at birth | ||||||||
| Non-manual workers | 64 | 0.4 | 1.00 | 1.00 | 67 | 0.4 | 1.00 | 1.00 |
| Manual workers | 62 | 0.5 | 1.21 (0.86 to 1.71) | 0.94 (0.66 to 1.35) | 74 | 0.5 | 1.30 (0.94 to 1.81) | 1.02 (0.72 to 1.44) |
| Agricultural workers | 23 | 0.7 | 2.32 (1.46 to 3.75) | 1.62 (0.99 to 2.67) | 18 | 0.9 | 1.68 (1.00 to 2.83) | 1.15 (0.68 to 1.97) |
| Poorly defined | ||||||||
| Non-manual workers | 117 | 0.6 | 1.00 | 1.00 | 102 | 0.7 | 1.00 | 1.00 |
| Manual workers | 98 | 0.9 | 1.04 (0.80 to 1.36) | 0.85 (0.65 to 1.12) | 117 | 0.8 | 1.35 (1.04 to 1.27) | 1.17 (0.89 to 1.55) |
| Agricultural workers | 29 | 1.1 | 1.60 (1.07 to 2.40) | 1.29 (0.85 to 1.96) | 28 | 1.2 | 1.72 (1.13 to 2.61) | 1.40 (0.91 to 2.17) |