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Table 3 Overweight prevalence, per cohort and family income quintile, at 1, 2 and 4 years

From: Trends in socioeconomic inequalities in anthropometric status in a population undergoing the nutritional transition: data from 1982, 1993 and 2004 pelotas birth cohort studies

Cohort study Overweight prevalence,%, per quintile SII (95% CI) RII (95% CI)
  Poorest 2nd 3rd 4th Richest   
1 year        
1982 5.0 7.9 4.4 7.8 9.2 3.93 (−0.69; 8.55) 1.85 (0.90; 3.80)
1993 12.9 9.9 8.0 14.4 9.1 −0.14 (−5.66; 5.38) 0.98 (0.52; 1.87)
2004 9.2 8.1 9.5 9.5 8.4 −0.12 (−3.29; 3.05) 0.99 (0.67; 1.46)
x 2 test for linear trend p = 0.222 p = 0.862 p = 0.006 p = 0.763 p = 0.636 p = 0.335* p = 0.525*
2 years        
1982 7.2 6.2 8.5 9.9 10.5 5.05 (2.31; 7.80) 1.93 (1.35; 2.76)
2004 7.5 8.2 7.0 8.9 10.0 2.86 (−0.22; 5.94) 1.46 (0.97; 2.18)
x 2 test for heterogeneity p = 0.800 p = 0.106 p = 0.224 p = 0.488 p = 0.767 p = 0.298* p = 0.321*
4 years        
1982 5.3 6.4 5.4 9.8 10.8 7.18 (4.52; 9.84) 2.84 (1.92; 4.20)
1993 6.0 10.1 8.7 13.5 16.0 12.69 (6.83; 18.54) 4.36 (2.18; 8.73)
2004 8.7 10.3 12.6 14.9 15.2 8.80 (5.09; 12.51) 2.27 (1.61; 3.22)
x 2 test for linear trend p = 0.007 p = 0.003 p < 0.001 p = 0.001 p = 0.006 p = 0.233* p = 0.390*
  1. CI = confidence interval; SII = slope index of inequality; RII = relative index of inequality.
  2. * x 2 test for heterogeneity to assess whether the coefficients of SII and RII are different across the three cohort studies.