Table 4

Likelihood of specific perinatal and mortality outcomes and smoking status at first booking

Smoking status at first bookingNColumn %Row %All infants (N)Crude HRAdjusted* HRPAF (%)
HR (95% CI)HR (95% CI)
Bacterial meningitis1251100.00.2697 003
Never smoked525420.1391 8611.00 (reference)1.00 (reference)11.8
Current smoker450360.3159 8192.09 (1.84 to 2.37)1.49 (1.30 to 1.71)
Former smoker125100.259 3261.57 (1.29 to 1.91)1.35 (1.11 to 1.64)
Unknown/missing151120.285 9971.34 (1.11 to 1.60)1.29 (1.06 to 1.57)
Acute and chronic otitis media and mastoiditis8879100.01.3697 003
Never smoked4866551.2391 8611.00 (reference)1.00 (reference)1.7
Current smoker2148241.3159 8191.05 (1.00 to 1.11)1.07 (1.02 to 1.14)
Former smoker75591.359 3261.02 (0.94 to 1.10)1.01 (0.94 to 1.10)
Unknown/missing1110131.385 9971.10 (1.03 to 1.18)1.13 (1.06 to 1.22)
Bronchopulmonary dysplasia358100.00.1697 003
Never smoked141390.0391 8611.00 (reference)1.00 (reference)10.1
Current smoker109300.1159 8191.90 (1.48 to 2.44)1.50 (1.15 to 1.96)
Former smoker2260.059 3261.03 (0.66 to 1.61)0.90 (0.57 to 1.42)
Unknown/missing86240.185 9972.79 (2.13 to 3.65)3.21 (2.45 to 4.22)
Long bone fracture5757100.00.8697 003
Never smoked3156550.8391 8611.00 (reference)1.00 (reference)−1.5
Current smoker1466250.9159 8191.11 (1.04 to 1.18)0.94 (0.88 to 1.01)
Former smoker53290.959 3261.11 (1.01 to 1.21)1.06 (0.96 to 1.16)
Unknown/missing603100.785 9970.93 (0.85 to 1.02)0.92 (0.83 to 1.01)
  • *Adjusted for: maternal age; infant gender, SIMD; mothers socioeconomic status; fathers socioeconomic status; parity; mode of delivery, infant feeding at 6–8 weeks and country of birth.

  • PAF, population attributable fraction; SIMD, Scottish Index of Multiple Deprivation.