Table 4.

Results of multiple linear regression analysis

Variables	Regression coefficient (β)	Std. error	Standardized coefficients	t	p value
(Constant)	17.431	0.973		17.915	0.000
Age in years	0.084	0.031	0.225	2.726	0.007
Qualification as MDS	0.797	0.353	0.124	2.261	0.025
Private practitioner	−1.362	0.378	−0.19	−3.606	0.000
Experience between 5 and 10 yrs	1.106	0.42	0.152	2.634	0.009
Experience more than 10 yrs	1.591	0.57	0.231	2.792	0.006

Simple linear regression showed a significantrelationship between knowledge with age of dentist (p < 0.001), qualification as MDS (p = 0.025), practice as private (p < 0.001), experience between 5 and 10 years (p = 0.009) and experience more than 10 years (p = 0.006). The slope coefficient for ages was 0.084 so the age of dentist increases by 0.084 unit of knowledge for each extra years of age. The R² value was 0.311 so 31.1% of the variation in knowledge can beexplained by the model containing age, education, type of practice and years of experience