Table 1. Age parameters and participants by technique.

Variable	Levels		Technique
		ST	CN	UT
Technique	ST	30
	CN		31
	UT			31
Age	30 ≤ Age ≤ 39	8	3	5
	40 ≤ Age ≤ 49	12	19	15
	50 ≤ Age ≤ 59	6	7	8
	More than 60	4	2	3