Table 3.

Comparison of the distribution of participants in the 2018 survey computed using the revised and the original KENPHIA weights

Characteristic	Unweighted n	2018 with revised weights		2018 with KENPHIA original weights
		Weighted % (or median)	95% CI (or IQR)	Weighted % (or median)	95% CI (or IQR)
Age at first sex	27,825	16.9	(14.8—19.1)	16.8	(14.8—19.0)
Tested in the last 12 months
No	10,028	44.4	(43.4—45.4)	43.9	(42.9—45.0)
Yes	12,764	55.6	(54.6—56.6)	56.1	(55.0—57.1)
Total	22,792	100		100
Sex
Male	12,374	49.3	(48.6—50.0)	49.5	(48.7—50.2)
Female	16,574	50.7	(50.0—51.4)	50.5	(49.8—51.3)
Total	28,948	100		100
Age
15–19	4951	17	(16.3—17.7)	18.9	(18.2—19.6)
20–24	4064	14.6	(13.8—15.4)	16.6	(15.8—17.4)
25–29	3841	13.7	(13.0—14.5)	14.9	(14.2—15.6)
30–34	3961	14	(13.4—14.5)	13.1	(12.6—13.6)
35–39	3006	10.4	(9.9—10.9)	10.6	(10.1—11.2)
40–44	2639	9	(8.6—9.5)	8	(7.6—8.5)
45–49	2073	6.8	(6.5—7.2)	6.4	(6.1—6.8)
50–54	1730	5.8	(5.4—6.1)	4.9	(4.6—5.1)
55–59	1438	4.8	(4.4—5.1)	3.7	(3.5—4.0)
60–64	1245	3.9	(3.6—4.1)	2.8	(2.6—3.0)
Total	28,948	100		100
Place of residence
Urban	10,752	39.3	(37.2—41.4)	37.9	(35.7—40.0)
Rural	18,196	60.7	(58.6—62.8)	62.1	(60.0—64.3)
Total	28,948	100		100
Level of education
No education	2309	6.4	(5.1—7.7)	5.7	(4.7—6.7)
Primary	14,613	47.4	(45.9—48.9)	47.4	(45.9—48.9)
Secondary +	12,024	46.2	(44.6—47.9)	46.9	(45.4—48.5)
Total	28,946	100		100
Marital status
Never married	8976	34.7	(33.7—35.6)	37.8	(36.8—38.8)
Separated/Divorced/Widowed	1888	6	(5.6—6.4)	5.2	(4.9—5.6)
Married/Living together	16,473	59.4	(58.3—60.4)	57	(55.9—58.1)
Total	27,337	100		100
Wealth index
Poorest	7058	19.3	(17.5—21.1)	19.5	(17.9—21.1)
Poorer	6574	21	(19.7—22.3)	21.8	(20.5—23.0)
Middle	6209	20.3	(19.1—21.5)	21	(19.7—22.2)
Richer	5370	19.7	(18.0—21.3)	19.5	(18.0—21.0)
Richest	3732	19.7	(17.5—22.0)	18.3	(16.2—20.4)
Total	28,943	100		100

Abbreviations: CI Confidence Interval, KENPHIA Kenya Population-based HIV Impact Assessment