From: Temporal trends in neonatal outcomes following iatrogenic preterm delivery
1995-96 | 2004-05 | |||||
---|---|---|---|---|---|---|
Plurality and gestational age and preterm birth subtype | Number of live births | Neonatal deaths/100 live births | Number of live births | Neonatal deaths/100 live births | Odds ratio (2004-05 vs 1995-96) | 95% confidence intervals |
Singletons | ||||||
24-27 wks: Iatrogenic | 7,580 | 17.3 | 10,202 | 16.2 | 0.92 | 0.85-1.00 |
Spontaneous | 10,295 | 19.7 | 8,865 | 16.5 | 0.80* | 0.75-0.87 |
PROM | 5,410 | 17.7 | 4,513 | 16.8 | 0.94 | 0.85-1.05 |
28-31 wks: Iatrogenic | 17,001 | 4.88 | 22,023 | 4.29 | 0.87* | 0.79-0.96 |
Spontaneous | 29,996 | 3.66 | 16,913 | 3.15 | 0.86* | 0.76-0.96 |
PROM | 9,181 | 3.67 | 7,351 | 3.14 | 0.85 | 0.72-1.01 |
32-33 wks: Iatrogenic | 17,938 | 2.55 | 25,068 | 2.96 | 0.76* | 0.67-0.87 |
Spontaneous | 26,093 | 1.62 | 23,136 | 1.41 | 0.87 | 0.75-1.01 |
PROM | 11,292 | 1.30 | 9,075 | 1.27 | 0.97 | 0.76-1.24 |
34-36 wks: Iatrogenic | 101,903 | 0.88 | 168,239 | 0.67 | 0.75* | 0.69-0.82 |
Spontaneous | 206,090 | 0.48 | 205,518 | 0.36 | 0.75* | 0.68-0.82 |
PROM | 40,205 | 0.55 | 31,688 | 0.47 | 0.85 | 0.69-1.05 |
24-36 wks: Iatrogenic | 144,422 | 2.48 | 225,532 | 1.86 | 0.75* | 0.71-0.78 |
Spontaneous | 262,474 | 1.56 | 254,432 | 1.22 | 0.78* | 0.74-0.81 |
PROM | 66,088 | 2.51 | 52,627 | 2.38 | 0.95 | 0.88-1.02 |
Twins | ||||||
24-27 wks: Iatrogenic | 1,953 | 20.1 | 3,305 | 17.7 | 0.86* | 0.74-0.99 |
Spontaneous | 1,955 | 25.3 | 1,685 | 19.8 | 0.73* | 0.62-0.85 |
PROM | 1,035 | 24.3 | 1,132 | 18.7 | 0.72* | 0.59-0.88 |
28-31 wks: Iatrogenic | 4,607 | 3.30 | 8,144 | 2.74 | 0.83 | 0.67-1.02 |
Spontaneous | 3,848 | 2.86 | 4,060 | 2.14 | 0.74* | 0.56-0.99 |
PROM | 2,149 | 2.75 | 2,333 | 2.53 | 0.92 | 0.64-1.32 |
32-33 wks: Iatrogenic | 6,290 | 1.95 | 12,076 | 0.64 | 0.67* | 0.47-0.94 |
Spontaneous | 5,799 | 0.47 | 5,798 | 0.50 | 1.07 | 0.64-1.82 |
PROM | 2,195 | 0.68 | 2,575 | 0.78 | 1.14 | 0.58-2.23 |
34-36 wks: Iatrogenic | 29,476 | 0.42 | 57,447 | 0.26 | 0.63* | 0.50-0.80 |
Spontaneous | 24,862 | 0.32 | 23,054 | 0.20 | 0.64* | 0.45-0.92 |
PROM | 3,768 | 0.58 | 4,180 | 0.31 | 0.53 | 0.27-1.06 |
24-36 wks: Iatrogenic | 42,326 | 1.72 | 80,972 | 1.28 | 0.74* | 0.67-0.82 |
Spontaneous | 36,464 | 1.95 | 34,597 | 1.43 | 0.73* | 0.66-0.82 |
PROM | 9,147 | 3.79 | 10,220 | 2.97 | 0.78* | 0.66-0.91 |