Table 3 Mean (± se) baseline data for experimental group (1) and external concurrent control group (C1)

n = 200

n = 212

Mean age

6.47 (0.04)

6.37 (0.04)

Student–t NS

% of boys

52.0% (3.5)

47.1% (3.4)

Chi-square NS

Mean number of siblings

3.34 (0.16)

3.10 (0.13)

Student–t NS

Prevalence of TV ownership

67.5% (3.3)

70.3% (3.1)

Chi-square NS

Mean BMI

14.73 (0.10)

14.64 (0.09)

Student–t NS

Prevalence of children categorized as below normal BMI

28.5% (3.2)

31.6% (3.2)

Chi-square NS

Prevalence of children with moderate to heavy STH infection

17.4% (2.9)

31.1% (3.2)

Chi-square p = 0.0013

Mean DMFS of permanent first molars

0.80 (0.11)

1.16 (0.15)

Student–t NS

Mean PUFA of permanent first molars

0.065 (0.02)

0.090 (0.03)

Student–t NS

Mean dmft primary dentition

7.74 (0.30)

8.27 (0.31)

Student–t NS

Mean pufa primary dentition

3.14 (0.20)

3.11 (0.17)

Student–t NS

Prevalence dmft>0

97.0% (1.2)

97.2% (1.1)

Chi-square NS

Prevalence DMFT>0 for permanent first molars

37.0% (3.4)

42.0% (3.4)

Chi-square NS