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Table 5 Relative index of inequality (RII) for maternal depression by time ranked by family income in the ALSPAC and the Pelotas birth cohort studies.

From: Differentials and income-related inequalities in maternal depression during the first two years after childbirth: birth cohort studies from Brazil and the UK

Time points Unadjusted analysis P* Adjusted analysis** P*
  ALSPAC
RII (95% CI)
Pelotas
RII (95% CI)
  ALSPAC
RII (95% CI)
Pelotas
RII (95% CI)
 
Time 1 a 3.25
(2.50; 4.22)
3.17
(1.56; 6.42)
0.948 2.86
(1.90; 4.30)
1.58
(0.67; 3.74)
0.246
Time 2 b 2.35
(1.79; 3.08)
3.51
(2.60; 4.74)
0.043 2.05
(1.34; 3.15)
2.33
(1.65; 3.31)
0.234
Time 3 c 3.43
(2.65; 4.43)
3.01
(2.25; 4.02)
0.511 2.91
(1.93; 4.39)
2.25
(1.60; 3.16)
0.743
  1. a at 8 weeks and 3 months after delivery for ALSPAC and Pelotas birth cohort, respectively
  2. b at 8 and 12 months after delivery for ALSPAC and Pelotas birth cohort, respectively
  3. c at 21 and 24 months after delivery for ALSPAC and Pelotas birth cohort, respectively
  4. * significance of the difference between ALSPAC and Pelotas birth cohort study
  5. ** adjusted for race, age, marital status, parity, pre-pregnancy body mass index, antenatal risk, smoking during pregnancy, multiple birth and neonatal problems.