Cohort study

Stunting prevalence,%, per quintile

SII (95% CI)

RII (95% CI)



Poorest

2^{nd}

3^{rd}

4^{th}

Richest
  

1 year

1982

19.8

10.6

6.0

5.5

3.6

−16.80 (−21.80; 11.82)

0.10 (0.04; 0.21)

1993

16.8

11.5

6.9

5.4

4.8

−18.52 (−24.84; 12.19)

0.19 (0.11; 0.34)

2004

8.1

9.1

5.7

3.8

3.1

−7.60 (−10.23; 4.98)

0.25 (0.15; 0.40)

x
^{2}
test for linear trend

p < 0.001

p = 0.350

p = 0.752

p = 0.178

p = 0.525

p < 0.001*

p = 0.125*

2 years

1982

28.9

21.8

10.1

7.1

3.6

−32.04 (−35.34; 28.74)

0.05 (0.04; 0.07)

2004

8.8

8.4

3.8

2.4

1.5

−10.34 (−12.74; 7.93)

0.09 (0.05; 0.17)

x
^{2}
test for heterogeneity

p < 0.001

p < 0.001

p < 0.001

p < 0.001

p = 0.007

p < 0.001*

p = 0.205*

4 years

1982

26.0

16.0

6.3

5.3

2.7

−27.79 (−30.83; 24.75)

0.04 (0.03; 0.06)

1993

11.8

4.6

5.5

2.3

2.6

−14.24 (−19.34; 9.15)

0.11 (0.05; 0.25)

2004

6.7

5.3

3.1

2.0

1.1

−7.21 (−9.30; 5.11)

0.11 (0.06; 0.21)

x
^{2}
test for linear trend

p < 0.001

p < 0.001

p = 0.002

p < 0.001

p = 0.028

p < 0.001*

p = 0.085*

 CI = confidence interval; SII = slope index of inequality; RII = relative index of inequality.
 * x
^{2} test for heterogeneity to assess whether the coefficients of SII and RII are different across the three cohort studies.