Table 3 Odds ratios (ORs) of planned and non-planned caesarean section (CS) births associated with socioeconomic status (SES) after adjustment for delivery characteristics according to parity during 2000–2010 in Finland
Model 1 crude | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | |
|---|---|---|---|---|---|---|
Adjusted by maternal age | Adjusted by Model 2 + prior CSa | Adjusted by Model 2 + birth weight | Adjusted by Model 2 + smoking | Adjusted by Model 2+ prior CSa, birth weight and smoking | ||
Planned CS | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
Nulliparous women | ||||||
SES | ||||||
Upper white collar workers | 1 | 1 | NA | 1 | 1 | 1 |
Lower white collar workers | 0.93 (0.87-0.98) | 1.13 (1.07-1.21) | 1.13 (1.06-1.20) | 1.13 (1.06-1.20) | 1.12 (1.05-1.19) | |
Blue collar workers | 0.79 (0.74-0.85) | 1.14 (1.06-1.22) | 1.13 (1.05-1.21) | 1.11 (1.03-1.20) | 1.11 (1.03-1.19) | |
Othersb | 0.74 (0.70-0.80) | 1.04 (0.97-1.11) | 1.04 (0.97-1.10) | 1.03 (0.97-1.10) | 1.03 (0.97-1.10) | |
Missing information | 0.76 (0.71-0.81) | 1.01 (0.95-1.08) | 1.00 (0.94-1.07) | 1.00 (0.93-1.07) | 0.99 (0.93-1.06) | |
Multiparous women | ||||||
SES | ||||||
Upper white collar workers | 1 | 1 | 1 | 1 | 1 | 1 |
Lower white collar workers | 1.03 (0.98-1.08) | 1.15 (1.10-1.21) | 1.17 (1.11-1.24) | 1.15 (1.10-1.20) | 1.14 (1.09-1.20) | 1.16 (1.10-1.22) |
Blue collar workers | 0.96 (0.91-1.01) | 1.16 (1.10-1.22) | 1.18 (1.11-1.25) | 1.14 (1.08-1.21) | 1.13 (1.07-1.19) | 1.14 (1.08-1.22) |
Othersb | 0.83 (0.79-0.88) | 1.00 (0.95-1.05) | 1.02 (0.96-1.07) | 0.99 (0.94-1.04) | 0.99 (0.94-1.04) | 1.00 (0.95-1.06) |
Missing information | 0.95 (0.90-1.00) | 1.12 (1.06-1.18) | 1.16 (1.09-1.23) | 1.11 (1.05-1.17) | 1.10 (1.05-1.17) | 1.14 (1.07-1.21) |
Non-planned CS | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) |
Nulliparous women | ||||||
SES | ||||||
Upper white collar workers | 1 | 1 | NA | 1 | 1 | 1 |
Lower white collar workers | 0.96 (0.92-1.00) | 1.13 (1.08-1.18) | 1.13 (1.08-1.18) | 1.12 (1.07-1.17) | 1.12 (1.07-1.17) | |
Blue collar workers | 0.92 (0.87-0.96) | 1.23 (1.17-1.29) | 1.22 (1.16-1.29) | 1.19 (1.13-1.25) | 1.19 (1.13-1.25) | |
Othersb | 0.77 (0.73-0.80) | 1.01 (0.97-1.06) | 1.01 (0.96-1.05) | 1.00 (0.96-1.05) | 1.00 (0.96-1.05) | |
Missing information | 0.87 (0.83-0.91) | 1.10 (1.05-1.15) | 1.10 (1.05-1.15) | 1.09 (1.03-1.14) | 1.08 (1.03-1.13) | |
Multiparous women | ||||||
SES | ||||||
Upper white collar workers | 1 | 1 | 1 | 1 | 1 | 1 |
Lower white collar workers | 1.04 (0.99-1.10) | 1.14 (1.08-1.20) | 1.15 (1.09-1.22) | 1.12 (1.06-1.18) | 1.12 (1.06-1.19) | 1.12 (1.06-1.19) |
Blue collar workers | 1.09 (1.02-1.15) | 1.26 (1.18-1.33) | 1.29 (1.21-1.37) | 1.20 (1.13-1.27) | 1.21 (1.14-1.29) | 1.22 (1.14-1.30) |
Othersb | 0.87 (0.82-0.92) | 1.00 (0.94-1.06) | 1.01 (0.96-1.08) | 0.97 (0.91-1.03) | 0.98 (0.93-1.04) | 0.98 (0.92-1.04) |
Missing information | 1.04 (0.98-1.10) | 1.18 (1.11-1.25) | 1.20 (1.12-1.28) | 1.12 (1.06-1.19) | 1.16 (1.09-1.23) | 1.14 (1.06-1.21) |