Table 3. Multivariable linear regression analysis for the association of plaque index with the various caregiver/child level factors.

Variables	Unadjusted		Adjusted
	Mean±SD*	95% Confidence Interval	Standardized Coefficients Beta	95% Confidence Interval	p-value
PLAQUE INDEX
Oral health literacy
Low	1.40±0.48	Ref	Ref.	Ref.
Adequate	1.10±0.52	-0.43, -0.16 ‡	-0.26	-0.41, -0.13 ‡	<0.001 ‡
Monthly Household Income (USD)
Less than 1650	1.32±0.52	Ref	Ref	Ref.
1650 to 3300	1.25±0.50	-0.34, 0.20	-0.23	-0.58, -0.03 †	0.03 †
3301 to 6600	1.25±0.50	-0.32, 0.18	-0.28	-0.55, -0.05 †	0.029 †
More than 6600	1.26±0.56	-0.32, 0.20	-0.27	-0.58, -0.06 †	0.015 †
Participant’s age in years
6–12	1.11±0.51	Ref	Ref	Ref
12–21	1.39±0.49	0.14, 0.41 ‡	0.33	0.18, 0.51 ‡	<0.001 ‡
Frequency of daily brushing
Less than twice	1.31±0.47	Ref	Ref	Ref
Twice or more	1.19±0.48	-0.33, 0.10	-0.15	-0.43, -0.01 †	0.046 †
Age of Caregiver
Less than 30	1.32±0.48	-0.54, 0.22	0.02	-0.38, 0.45	0.862
30–40	1.13±0.53	-0.56, -0.15 †	-0.19	-0.43, 0.03	0.092‡
40–50	1.30±0.50	-0.40, 0.02	-0.11	-0.34, 0.10	0.291
Greater than 50	1.49±0.47	Ref	Ref	Ref
Self-efficacy Score	1.30±0.46	-0.04, 0.11	0.08	-0.04, 0.12	0.308

Adjusted R² for Plaque Index = 0.20.

*Independent sample t-test or ANOVA.

^† Statistically significant at the 5% level;

^‡Statistically significant at the 1% level.