TABLE 2

aORs and 95% CIs Comparing Those Born Late-Preterm (34 wk 0 d to 36 wk 6 d of Gestation) and Term (37 wk 0 d to 41 wk 6 d of Gestation) in the Maximum Attained Lifetime SEP

SEPModel 1Model 2Model 3
aOR (95% CI)PaOR (95% CI)PaOR (95% CI)P
Odds of belonging to lowest SEP category versus middle/highest category
 Occupational status: manual worker
  Late-preterm (34–36 wk)1.61 (1.26–2.05)<.0011.66 (1.30–2.13)<.0011.65 (1.29–2.12)<.001
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
 Educational level: basic or upper secondary
  Late-preterm (34–36 wk)1.31 (1.07–1.61).011.32 (1.06–1.64).011.31 (1.05–1.62).02
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
 Income: lowest income tertile
  Late-preterm (34–36 wk)1.34 (1.11–1.62).0021.34 (1.10–1.62).0031.33 (1.10–1.61).004
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
Odds of belonging to highest SEP category versus middle/lowest category
 Occupational status: senior clerical
  Late-preterm (34–36 wk)0.83 (0.68–1.00).050.83 (0.68–1.01).070.84 (0.69–1.03).09
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
 Educational level: higher tertiary education
  Late-preterm (34–36 wk)0.85 (0.62–1.17).320.86 (0.62–1.20).370.87 (0.63–1.21).41
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
 Income: highest income tertile
  Late-preterm (34–36 wk)0.75 (0.62–0.93).010.76 (0.62–0.94).010.77 (0.63–0.95).02
  Term (37–41 wk)1.0 (reference)1.0 (reference)1.0 (reference)
  • Model 1 is adjusted for gender and year of birth; Model 2 is further adjusted for father’s occupational category in childhood, birth order, mother’s age, and mother’s BMI at delivery; Model 3 is further adjusted for birth weight relative to length of gestation.