Table 2.

Mean ± SD plaque, gingival, and calculus indices for the 5-year-old age group by gender and governorate.

	Plaque index	Calculus index	Gingival index
Gender
Male (n = 646)	0.34 ± 0.46	0.00 ± 0.00	0.22 ± 0.02
Female (n = 646)	0.35 ± 0.48	0.00 ± 0.01	0.17 ± 0.01
Total (n = 1292)	0.35 ± 0.47	0.00 ± 0.01	0.19 ± 0.38
t -test	0.77	0.037	0.32
Governorate
Sana'a (n = 456)	0.51 ± 0.47	0.00 ± 0.10	0.39 ± 0.49
Taiz (n = 456)	0.11 ± 0.28	0.00 ± 0.00	0.06 ± 0.20
Hodeida (n = 152)	0.35 ± 0.50	0.00 ± 0.00	0.11 ± 0.28
Hadramaut (n = 228)	0.50 ± 0.57	0.00 ± 0.00	0.13 ± 0.33
Total (n = 1292)	0.35 ± 0.47	0.00 ± 0.01	0.19 ± 0.38
ANOVA	<0.001	0.61	<0.001