Demographic data 
Studied Groups 
Control (n = 35) 
Patients (n = 75) 
1) Age (years)
Mean ± SD 
6.1 ±1.7 
6.01 ± 1.9 

t: 0.356, p value: 0.722 
2) Gender 
19 (54.3%) 
39 (52%) 
Female: 
Male: 
16 (45.7%) 
36 (48%) 

χ^{2}: 0.050 , p value: 0.823 
3) Residence 

Rural 
19 (54.3%) 
35 (46.7%) 
Urban 
16 (45.7%) 
40 (53.3%) 

χ^{2} : 0.554, p value: 0.457 
P is significant if < 0.05 
