. 2020 Oct 30;66(3):169–177. doi: 10.1111/idj.12216

Table 3.

Bivariate analysis between decayed, missing and filled teeth (DMFT) scores and different sociodemographic variables: (a) t-test; and (b) analysis of variance (ANOVA)


Category	DMFT score		Levene’s test for equality of variance		t-test for equality of means
	Mean	Standard deviation	F	P	Equal variance assumed		Equal variance not assumed
	Mean	Standard deviation	F	P	t	P	t	P
(a) t-test
Gender
Male	1.76	2.12	26.65	.000^*	–		−4.189	0.000^*
Female	2.39	2.50	26.65	.000^*	–		−4.189	0.000^*
Geographical location of school
Rural school	1.70	2.39	2.71	0.10	2.52	0.01^*	–
Urban school	1.65	2.24	2.71	0.10	2.52	0.01^*	–
Type of school
Private school	2.19	2.13	15.71	0.000^*	–		−4.875	0.000^*
Public school	2.64	2.47	15.71	0.000^*	–		−4.875	0.000^*

	Sum of squares	d.f.	Mean square	F	Sig.
(b) ANOVA
Age
Between groups	40.06	4	10.05	1.863	0.115
Within groups	5,208.29	969	5.37	1.863	0.115
Father’s highest level of education
Between groups	144.95	5	28.98	5.499	0.000^*
Within groups	5,103.41	968	5.27	5.499	0.000^*
Mother’s highest level of education
Between groups	177.32	5	35.46	6.770	0.000^*
Within groups	5,071.03	968	5.23	6.770	0.000^*
Community
Between groups	178.36	3	59.45	11.375	0.000^*
Within groups	5,069.98	970	5.22	11.375	0.000^*
Total	5,248.35	973

ANOVA, analysis of variance; d.f., degrees of freedom; Sig, significance.

P < 0.005.