Table 1.

Sample frame

Strata number	Strata	Populationa	Population (%)	Sample size
				Insured	Non-insured
1	3A village	4059	5.05	10	10
2	3B village	7433	9.26	17	17
3	3C village	5316	6.62	12	12
4	4A village	18,776	23.38	44	44
5	4B village	5681	7.07	13	13
6	Gitathuru village	3737	4.65	8	8
7	Kiamutissya village	5825	7.25	14	14
8	Kosovo village	8085	10.00	18	18
9	Kwa Kariuki village	5290	6.59	13	13
10	Mabatini village	1160	1.44	3	3
11	Mashimoni village	4478	5.58	10	10
12	No. 10 village	2594	3.23	6	6
13	No. 2 village	7875	9.81	18	18
(N)	Total population	80,309	100.00	186 +	186 = 372

^asourced from the 2009 population census