Sampling Technique

‣The district was purposively selected for this study since this area has largest population of elderly in Thailand. Two-stage cluster sampling was employed to draw a sample. Six out of 25 sub-districts were chosen by simple random sampling technique.

	Nakhon Ratchasima Province
		↓	←	Purposively selected
	Muang District 25 sub-districts
		↓	←	simple random sampling
↓
↓	↓	↓	↓	↓	↓
Subdist1	Subdist2	Subdist3	Subdist4	Subdist5	Subdist6
↓	↓	↓	↓	↓	↓	←	Simple random sampling
55	113	122	34	30	48
402 VHVs

↓

Number of VHVs randomly selected from each sub-district

Sub-district	Name	Random no	Number of VHVs	Sample no
1	Nongchabog	3	206	55
2	Nongpailom	10	425	113
3	Choho	16	460	122
4	Chaimongtkol	18	127	34
5	Panoa	23	114	30
6	Nongkatum	24	182	48
		Total	1514	402