Table 3 Association between smoking status and referrals to maternal care professionals
| Â | Proportion N (%) | Crude OR (95% CI) | Adjusted OR (95% CI)a |
|---|---|---|---|
Referral outcomes | |||
 During pregnancy | |||
 General practitioner | 432 (1.1) |  |  |
  Non-smokers | 363 (1.1) | Ref | Ref |
  Early stoppers | 30 (0.9) | 0.88 (0.60–1.27) | 0.88 (0.59–1.32) |
  Late- or non-stoppers | 39 (1.0) | 0.97 (0.70–1.36) | 0.92 (0.64–1.32) |
 Obstetrician (incidental) | 16 436 (40.0) |  |  |
  Non-smokers | 13 378 (39.2) | Ref | Ref |
  Early stoppers | 1374 (42.7) | 1.15 (1.07–1.24)b | 1.11 (1.03–1.20) |
  Late- or non-stoppers | 1684 (44.7) | 1.24 (1.16–1.33) | 1.20 (1.11–1.29) |
 Obstetrician (handover of care) | 13 612 (33.1) |  |  |
  Non-smokers | 10 844 (31.8) | Ref | Ref |
  Early stoppers | 1242 (38.6) | 1.58 (1.45–1.73) | 1.49 (1.36–1.63) |
  Late- or non-stoppers | 1526 (40.5) | 1.64 (1.52–1.78) | 1.58 (1.45–1.73) |
 Other specialist | 237 (0.6) |  |  |
  Non-smokers | 194 (0.6) | Ref | Ref |
  Early stoppers | 25 (0.8) | 1.37 (0.90–2.08) | 1.50 (0.98–2.30) |
  Late- or non-stoppers | 18 (0.5) | 0.84 (0.52–1.36) | 1.03 (0.63–1.68) |
 During birth | |||
 Obstetrician (incidental) | 340 (0.8) |  |  |
  Non-smokers | 286 (0.8) | Ref | Ref |
  Early stoppers | 22 (0.7) | 0.86 (0.55–1.33) | 0.79 (0.50–1.25) |
  Late- or non-stoppers | 32 (0.8) | 1.10 (0.76–1.59) | 0.94 (0.62–1.43) |
 Obstetrician (handover of care) | 9298 (22.6) |  |  |
  Non-smokers | 7540 (22.1) | Ref | Ref |
  Early stoppers | 851 (26.5) | 1.56 (1.42–1.72) | 1.30 (1.17–1.44) |
  Late- or non-stoppers | 907 (24.1) | 1.41 (1.29–1.54) | 1.40 (1.27–1.55) |
  < 6 weeks postpartum | |||
 General practitioner | 33 (0.1) |  |  |
  Non-smokers | 27 (0.1) | Ref | Ref |
  Early stoppers | 4 (0.1) | NA | NA |
  Late- or non-stoppers | 2 (0.1) | NA | NA |
 Obstetrician (incidental) | 541 (1.3) |  |  |
  Non-smokers | 468 (1.4) | Ref | Ref |
  Early stoppers | 40 (1.2) | 0.96 (0.69–1.32) | 0.88 (0.62–1.24) |
  Late- or non-stoppers | 33 (0.9) | 0.69 (0.49–0.99) | 0.69 (0.47–0.99) |
 Obstetrician (handover of care) | 682 (1.7) |  |  |
  Non-smokers | 606 (1.8) | Ref | Ref |
  Early stoppers | 30 (0.9) | 0.69 (0.47–0.99) | 0.63 (0.43–0.93) |
  Late- or non-stoppers | 46 (1.2) | 0.89 (0.65–1.20) | 0.82 (0.59–1.13) |
 Pediatrician | 618 (1.5) |  |  |
  Non-smokers | 525 (1.5) | Ref | Ref |
  Early stoppers | 39 (1.2) | 0.79 (0.57–1.09) | 0.73 (0.51–1.04) |
  Late- or non-stoppers | 54 (1.4) | 0.93 (0.70–1.23) | 0.92 (0.68–1.24) |
 Other specialist | 21 (0.1) |  |  |
  Non-smokers | 20 (0.1) | NA | NA |
  Early stoppers | 1 (0.0) | NA | NA |
  Late- or non-stoppers | - | NA | NA |