Table (7).

Significant variables related to Dental Environment Scale stressors assessed by (Level of Undergraduate Study) based on linear regression analysis

Model	Variables	Understandardized Coefficients	Standardized Coefficients	R2	R2 Changing	T	P-value
		B	Beta
1	(Constant)	3.124		0.098	0.098	63.444	0.000
	Difficulty of classwork	0.137	0.313			6.805	0.000
2	(Constant)	2.970		0.126	0.028	46.471	0.000
	Difficulty of classwork	0.122	0.279			6.044	0.000
	Difficulty in learning clinical procedures & protocols	0.089	0.172			3.720	0.000
3	(Constant)	3.103		0.172	0.045	45.525	0.000
	Difficulty of classwork	0.140	0.318			6.957	0.000
	Difficulty in learning clinical procedures & protocols	0.130	0.251			5.231	0.000
	Completing graduation requirements	−0.131	−0.233			−4.823	0.000
4	(Constant)	3.199				42.983	0.000
	Difficulty of classwork	0.151	0.344	0.190	0.018	7.470	0.000
	Difficulty in learning clinical procedures & protocols	0.141	0.271			5.664	0.000
	Completing graduation requirements	−0.125	−0.224			−4.667	0.000
	Completion for grades	−0.066	−0.140			−3.068	0.002
5	(Constant)	3.134		0.204	0.014	40.393	0.000
	Difficulty of classwork	0.148	0.338			7.388	0.000
	Difficulty in learning clinical procedures & protocols	0.121	0.234			4.736	0.000
	Completing graduation requirements	−0.141	−0.252			−5.175	0.000
	Completion for grades	−0.073	0.155			−3.393	0.001
	Lack of adequate preclinical/clinical staff in lab/clinic	0.067	0.135			2.776	0.006
6	(Constant)	3.180		0.219	0.015	40.381	0.000
	Difficulty of classwork	0.158	0.361			7.825	0.000
	Difficulty in learning clinical procedures & protocols	0.128	0.246			4.999	0.000
	Completing graduation requirements	−0.125	−0.223			−4.538	0.000
	Completion for grades	−0.069	−0.147			−3.239	0.001
	Lack of adequate preclinical/clinical staff in lab/clinic	0.069	0.139			2.877	0.004
	The amount of information given	−0.060	−0.131			−2.799	0.005

Dependent Variable: Level of Undergraduate Study