Untreated dental caries prevalence and impact on the quality of life among 11 to14-year-old Egyptian schoolchildren: a cross-sectional study

Table 6 Multiple regression analysis of factors influencing oral health related quality of life (OHRQoL) in 11 to 14 years school children

Predictors	β	95% CI	p-value	Adjusted R²
Step 1
Gender	0.18	2.75;5.58	<0.0001	0.04
Age (years)	−0.83	−1.67; − 0.26	0.007
Step 2
Gender	0.08	0.68;2.98	0.002	0.38
Age (years)	− 0.02	− 0.82;0.31	0.38
Household expenditure	0.16	2.30;5.01	<0.0001
School type	−0.54	−15.34;-12.38	<0.0001
Mother education	−0.23	−8.42;-5.30	<0.0001
Step 3
Gender	0.08	075;3.05	0.001	0.4
Age (years)	−0.2	−0.79;0.33	0.43
Household expenditure	0.14	1.99;4.67	<0.0001
School type	−0.5	−14.26;-11.04	<0.0001
Mother education	−0.22	−8.18;-5.04	<0.0001
Mouth washing frequency	−0.05	−5.24;0.16	0.07
Tooth brushing frequency	−0.11	−1.59;0.56	<0.0001
Dental appointment	−0.07	−3.15;-0.21	0.025
Dental floss use	−0.07	−2.21;-0.17	0.014
Step 4
Gender	−0.03	−1.54;0.28	0.17	0.64
Age (years)	−0.03	−0.77;0.09	0.12
Household expenditure	0.07	0.62;2.70	0.002
School type	−0.38	−10.97;-8.45	<0.0001
Mother education	−0.17	−6.36;-3.93	<0.0001
Mouth washing frequency	−0.04	−3.89;0.28	0.09
Tooth brushing frequency	−0.07	−1.05;-0.26	0.001
Dental appointment	−0.08	−1.58;0.73	0.47
Dental floss use	−0.05	−1.53;1.44	0.95
DMFT	0.02	−0.34;1.45	0.23
DT	0.54	12.88;15.03	<0.0001

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