Adjusted and crude odds ratios of factors associated with DDH in South Australian singleton male live births (1986-93)
| Variables | No of Subjects | Crude OR | Adjusted OR3-150 | Coefficients (β) in logisitc regression analysis | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cases (n=243) | Controls (n=75439) | OR (95% CI) | OR (95% CI) | |||||||
| Mother’s age (yrs): | ||||||||||
| <20 | 8 | 4565 | 1.00 | 1.00 | 0.0000 | |||||
| 20-24 | 47 | 16475 | 1.63 (0.74, 3.73) | 1.74 (0.82, 3.71) | 0.5545 | |||||
| 25-29 | 117 | 28869 | 2.31 (1.09, 5.10) | 2.58 (1.25,5.34) | 0.9492 | |||||
| 30-34 | 51 | 18923 | 1.54 (0.70, 3.50) | 1.75 (0.82, 3.75) | 0.5614 | |||||
| 35+ | 20 | 6607 | 1.73 (0.72, 4.27) | 2.13 (0.92, 4.95) | 0.7568 | |||||
| Parity: | ||||||||||
| 0 | 142 | 30594 | 2.45 (1.67, 3.62) | 2.25 (1.52, 3.33) | 0.8100 | |||||
| 1 | 66 | 26353 | 1.32 (0.86, 2.04) | 1.24 (0.82, 1.88) | 0.2147 | |||||
| 2+ | 35 | 18492 | 1.00 | 1.00 | 0.0000 | |||||
| Presentation and delivery: | ||||||||||
| Non-breech presentation | 158 | 72850 | 1.00 | 1.00 | 0.0000 | |||||
| Breech, caesarean delivery | 72 | 2251 | 14.75 (11.02, 19.72) | 16.35 (12.06, 22.16) | 2.7942 | |||||
| Breech, breech delivery | 13 | 338 | 17.73 (9.53, 32.36) | 28.72 (15.91, 51.85) | 3.3576 | |||||
| Region of residence: | ||||||||||
| Metropolitan | 186 | 52800 | 1.43 (1.03, 2.00) | 1.35 (0.97, 1.87) | 0.2984 | |||||
| Outer metropolitan | 10 | 3529 | 1.15 (0.55,2.36) | 1.07 (0.54, 2.12) | 0.0641 | |||||
| Country | 47 | 19110 | 1.00 | 1.00 | 0.0000 | |||||
| Oligohydramnios: | ||||||||||
| Present | 1 | 93 | 3.35 (0.46, 24.11) | 3.47 (0.44, 27.49) | 1.2435 | |||||
| Absent | 242 | 75346 | 1.00 | 1.00 | 0.0000 | |||||
| Birthweight (g): | ||||||||||
| <2000 | 0 | 1161 | 0.00 (0.00, 1.31) | 0.02 (0, 82.96) | −4.0938 | |||||
| 2000-2499 | 3 | 1988 | 0.48 (0.12, 1.56) | 0.69 (0.43, 2.35) | −0.3775 | |||||
| 2500-2999 | 32 | 9209 | 1.09 (0.71, 1.67) | 1.09 (0.71, 1.66) | 0.0865 | |||||
| 3000-3499 | 84 | 26463 | 1.00 | 1.00 | 0.0000 | |||||
| 3500-3999 | 80 | 25726 | 0.98 (0.71, 1.35) | 1.10 (0.80, 1.51) | 0.0953 | |||||
| 4000-4499 | 35 | 9203 | 1.20 (0.79, 1.81) | 1.45 (0.96, 2.18) | 0.3688 | |||||
| 4500+ | 9 | 1689 | 1.68 (0.79, 3.45) | 2.44 (1.21, 4.96) | 0.8940 | |||||
| Gestation (weeks): | ||||||||||
| <37 | 3 | 3987 | 0.25 (0.06, 0.82) | 0.24 (0.07, 0.83) | −1.4105 | |||||
| 37 | 8 | 3163 | 0.85 (0.38, 1.79) | 0.56 (0.26, 1.20) | −0.5754 | |||||
| 38 | 34 | 9211 | 1.23 (0.82, 1.84) | 0.86 (0.57, 1.30) | −0.1471 | |||||
| 39 | 51 | 12813 | 1.33 (0.94, 1.88) | 0.95 (0.67, 1.35) | −0.0497 | |||||
| 40 | 107 | 35756 | 1.00 | 1.00 | 0.0000 | |||||
| 41 | 33 | 8989 | 1.23 (0.81, 1.84) | 1.21 (0.81, 1.80) | 0.1873 | |||||
| 42+ | 7 | 1520 | 1.54 (0.66, 3.43) | 1.41 (0.65, 3.06) | 0.3408 | |||||
| Constant | −7.6060 | |||||||||
↵3-150 Logistic regression analysis.