| 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 | 0.94 (0.83-1.06) | Â | 0.91 (0.80-1.03) | 1.04 (0.92-1.18) | Â | 1.04 (0.92-1.18) | 0.85 (0.75-0.97) | Â | 0.87 (0.76-1.00) |
Area Deprivation | Â | 1.17 (1.01-1.34) | 1.19 (1.03-1.38) | Â | 1.01 (0.88-1.15) | 1.00 (0.87-1.14) | Â | 0.83 (0.71-0.96) | 0.85 (0.73-0.99) |
No previous Caesarean section | Â | Â | Â | Â | Â | Â | |||
Social Class | 1.06 (0.88-1.27) | Â | 1.04 (0.87-1.26) | 1.09 (0.86-1.37) | Â | 1.08 (0.85-1.37) | 0.88 (0.70-1.09) | Â | 0.91 (0.73-1.14) |
Area Deprivation | Â | 1.12 (0.90-1.38) | 1.11 (0.89-1.47) | Â | 1.04 (0.81-1.34) | 1.02 (0.79-1.32) | Â | 0.73 (0.57-0.94) | 0.75 (0.58-0.96) |
Previous Caesarean section | Â | Â | Â | Â | Â | Â | Â | ||
Social Class | 0.82 (0.65-1.02) | Â | 0.76 (0.61-0.95) | 0.92 (0.76-1.11) | Â | 0.91 (0.75-1.10) | 0.80 (0.65-0.99) | Â | 0.81 (0.65-1.00) |
Area Deprivation | Â | 1.36 (1.07-1.73) | 1.45 (1.13-1.85) | Â | 1.06 (0.86-1.30) | 1.08 (0.88-1.33) | Â | 0.92 (0.73-1.16) | 0.96 (0.76-1.22) |