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Table 17 Subgroup analysis: reading skillsa

From: Effects of the Informed Health Choices primary school intervention on the ability of children in Uganda to assess the reliability of claims about treatment effects, 1-year follow-up: a cluster-randomised trial

 

Control schools

Intervention schools

Adjusted differenceb

Odds ratio

ICC

Mean score, %

 Lacking basic reading skills (N = 1775)

No. of children = 893

No. of children = 882

   

Mean score: 47.2%

(SD 16.4%)

Mean score: 57.1%

(SD 18.1%)

Mean difference: 11.2%

(95% CI, 8.2% to 14.2%)

 

0.146

 Basic reading skills (N = 2672)

No. of children = 1093

No. of children = 1579

   

Mean score: 55.2%

(SD 16.9%)

Mean score: 67.9%

(SD 16.8%)

Mean difference: 14.8%

(95% CI, 12.3% to 17.3%)

 

0.162

 Advanced reading skills (N = 2340)

No. of children = 858

No. of children = 1482

   

Mean score: 56.3%

(SD 15.6%)

Mean score: 76.5%

(SD 15.5%)

Mean difference: 19.4%

(95% CI, 16.9% to 21.9%)

 

0.117

Passing score (≥ 13 of 24 correct answers)

 Lacking basic reading skills (N = 1775)

No. of children = 893

No. of children = 882

   

36.6% of children

n = 327

59.3% of children

n = 523

28.9% more children

(95% CI, 20.8% to 36.7%)

0.30

(95% CI, 0.20 to 0.43)

0.144

 Basic reading skills (N = 2672)

No. of children = 1093

No. of children = 1579

   

57.0% of children

n = 623

81.2% of children

n = 1282

33.6% more children

(95% CI, 24.0% to 41.9%)

0.21

(95% CI, 0.15 to 0.31)

0.150

 Advanced reading skills (N = 2340)

No. of children = 858

No. of children = 1482

   

60.0% of children

n = 514

91.4% of children

n = 1355

33.4% more children

(95% CI, 25.7% to 42.5%)

0.13

(95% CI, 0.09 to 0.18)

0.098

Mastery score (≥ 20 of 24 correct answers)

 Lacking basic reading skills (N = 1775)

No. of children = 893

No. of children = 882

 

0.22

 

3.0% of children

n = 27

10,1% of children

n = 89

7.7% more children

(95% CI, 5.6% to 8.8%)

(95% CI, 0.12 to 0.42)

0.220

 Basic reading skills (n = 2672)

No. of children = 1093

No. of children = 1579

 

0.15

 

6.5% of children

n = 71

24.1% of children

n = 380

19.6% more children

(95% CI, 17.0% to 21.3%)

(95% CI, 0.09 to 0.24)

0.192

 Advanced reading skills (n = 2340)

No. of children = 858

No. of children = 1482

 

0.06

 

4.8% of children

n = 41

45.1% of children

n = 669

40.4% more children

(95% CI, 38.2% to 41.9%)

(95% CI, 0.04 to 0.09)

0.139

  1. aBecause reading skills were measured after the intervention, we have not reported a test of interaction here (see Additional file 2)
  2. bThe adjusted difference is based on mixed models with a random effects term for the clusters and the stratification variables modelled as fixed effects, using logistic regression for dichotomous outcomes and linear regression for continuous outcomes. The odds ratios from the logistic regressions for passing scores and mastery scores have been converted to differences using the intervention school proportions and the inverse of the odds ratios shown here
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Trials

ISSN: 1745-6215