| 1980-81 | 1990-91 | 1999-2000 | ||||||
---|---|---|---|---|---|---|---|---|---|
 | Model SC | Model AD | Model SC+AD | Model SC | Model AD | Model SC+AD | Model SC | Model AD | Model SC+AD |
 | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) | RII (95%CI) |
All Births | Â | Â | Â | Â | Â | Â | Â | Â | |
Social Class | 1.16 (1.06-1.28) | Â | 1.14 (1.04-1.25) | 1.15 (1.05-1.25) | Â | 1.13 (1.04-1.23) | 1.03 (0.94-1.13) | Â | 1.02 (0.93-1.12) |
Area Deprivation | Â | 1.21 (1.08-1.35) | 1.18 (1.05-1.32) | Â | 1.16 (1.05-1.28) | 1.13 (1.02-1.26) | Â | 1.03 (0.93-1.13) | 1.02 (0.93-1.13) |
No previous Caesarean section | Â | Â | Â | Â | Â | Â | |||
Social Class | 1.18 (1.06-1.31) | Â | 1.15 (1.03-1.28) | 1.18 (1.07-1.29) | Â | 1.15 (1.05-1.26) | 1.04 (0.94-1.15) | Â | 1.04 (0.93-1.15) |
Area Deprivation | Â | 1.26 (1.11-1.42) | 1.23 (1.08-1.39) | Â | 1.20 (1.08-1.34) | 1.17 (1.05-1.31) | Â | 1.03 (0.92-1.14) | 1.02 (0.91-1.14) |
Previous Caesarean section | Â | Â | Â | Â | Â | Â | Â | ||
Social Class | 1.25 (0.97-1.61) | Â | 1.24 (0.96-1.61) | 1.03 (0.82-1.30) | Â | 1.03 (0.81-1.30) | 0.90 (0.70-1.17) | Â | 0.90 (0.70-1.17) |
Area Deprivation | Â | 1.07 (0.80-1.43) | 1.02 (0.76-1.37) | Â | 1.01 (0.78-1.31) | 1.00 (0.77-1.30) | Â | 0.98 (0.75-1.28) | 1.00 (0.76-1.32) |