Table 2

Mixed-effects Poisson estimates of the likelihood of having a postnatal check for women who had given birth to a single live infant by age, Townsend score, mode of delivery, number of births, smoking status and year group; unadjusted, and adjusted for age and deprivation

Characteristicn (%)Record of postnatal check in weeks 5–10
Unadjusted
(IRR (95% CI))
Age and deprivation adjusted (IRR (95% CI))
Overall275 577
Maternal age (years)
 15–198704 (3.2)0.88 (0.85 to 0.91)0.89 (0.87 to 0.92)
 20–2438 503 (14.0)0.92 (0.91 to 0.94)0.93 (0.92 to 0.95)
 25–2968 751 (25.0)0.97 (0.96 to 0.98)0.97 (0.96 to 0.99)
 30–3486 889 (31.5)11
 35–3957 533 (20.9)1.00 (0.99 to 1.02)1.00 (0.99 to 1.01)
 40–4414 428 (5.2)0.99 (0.97 to 1.01)0.99 (0.97 to 1.01)
 45–49769 (0.3)0.96 (0.87 to 1.05)0.96 (0.87 to 1.05)
Townsend score
 1—least deprived58 304 (21.2)11
 253 370 (19.4)0.99 (0.98 to 1.01)1.00 (0.98 to 1.01)
 361 681 (22.4)0.97 (0.95 to 0.98)0.97 (0.96 to 0.99)
 458 165 (21.1)0.95 (0.93 to 0.97)0.96 (0.95 to 0.98)
 5—most deprived44 057 (16.0)0.90 (0.88 to 0.92)0.92 (0.90 to 0.93)
Mode of delivery
 Vaginal delivery68 202 (76.6)11
 Caesarean20 828 (23.4)1.02 (1.00 to 1.04)1.01 (0.99 to 1.03)
 Unknown186 5470.99 (0.97 to 1.01)0.99 (0.97 to 1.01)
No of births
 First132 164 (48.0)11
 Second62 535 (22.7)0.99 (0.98 to 1.01)0.98 (0.97 to 0.99)
 Third or higher18 504 (6.7)0.95 (0.93 to 0.97)0.94 (0.92 to 0.96)
 Unknown62 374 (22.6)0.96 (0.95 to 0.97)0.95 (0.94 to 0.96)
Smoking status
 Current smoker31 494 (11.4)0.94 (0.92 to 0.95)0.96 (0.95 to 0.98)
 Former smoker76 941 (27.9)0.96 (0.95 to 0.97)0.96 (0.95 to 0.98)
 Non-smoker126 497 (45.9)11
 Unknown40 645 (14.8)0.95 (0.94 to 0.97)0.95 (0.93 to 0.96)
Year group
 2006–200758 606 (21.3)11
 2008–200960 212 (21.9)0.99 (0.98 to 1.01)0.99 (0.98 to 1.01)
 2010–201159 183 (21.5)1.00 (0.99 to 1.02)1.00 (0.99 to 1.02)
 2012–201355 099 (20.0)0.99 (0.97 to 1.00)0.99 (0.97 to 1.01)
 2014–201542 477 (15.4)0.95 (0.94 to 0.97)0.95 (0.94 to 0.97)
  • Practice and woman are included as random effect terms in all models.

  • IRR, incedence rate ratio.