Table 5. Risk of SNM-M Arising in the Newborn’s Birth Admission of the Second Pregnancy, or up to 27 Days Thereafter, by Degree of Upward Mobility From a Neighborhood Income Q1 to a Higher Neighborhood Income Quintile (Q2 or Q3; or Q4 or Q5) Between the First and Second Consecutive Birth vs Those With No Upward Mobilitya.
| Degree of neighborhood income mobility between births | No. with SNM-M (rate per 1000 live births) | Relative risk (95% CI) | Adjusted absolute risk difference, (per 1000 live births, 95% CI)b,c | |
|---|---|---|---|---|
| Unadjustedb | Adjustedb,c | |||
| No upward mobility (n = 53 403) | 2717 (50.9) | 1 [Reference] | 1 [Reference] | 0 [Reference] |
| Moved from a Q1 to a Q2/3 neighborhood (n = 27 731) | 1354 (48.8) | 0.96 (0.91 to 1.01) | 0.93 (0.88 to 0.97) | −3.8 (−6.0 to −1.0) |
| Moved from a Q1 to a Q4/5 neighborhood (n = 14 471) | 671 (46.4) | 0.91 (0.86 to 0.97) | 0.87 (0.81 to 0.93) | −6.7 (−9.8 to −3.7) |
Abbreviations: Q, quintile; SNM-M, severe neonatal morbidity or neonatal mortality.
a
Data are limited to nulliparous women who were initially residing in a lowest income Q1 neighborhood at their first birth, and who had a second birth also in Ontario. Births include all singleton hospital live births at 20 weeks and 0 days gestation to 42 weeks and 0 days gestation in Ontario, Canada, 2002 to 2019.
b
Using an adapted approach to logistic regression analysis.41
c
Adjustment described in the Statistical Analysis section.