Table 3.

Estimated mean attendance rates for the Kitale Eye Unit

		Control group	Intervention group	Difference	p value*	pinteractionvalue†
Overall		33 (23–43)	82 (59–105)	49 (25–73)	0·0002	NA
Sex
	Female	32 (23–41)	90 (64–116)	59 (32–86)	0·0001	0·028
	Male	35 (21–49)	73 (52–94)	39 (15–63)	0·003	..
Age group, years
	<15	9 (5–13)	20 (11–29)	11 (1–20)	0·029	0·0008
	15–29	22 (12–33)	59 (39–79)	36 (14–58)	0·002	..
	30–44	38 (17–59)	105 (62–148)	67 (21–113)	0·006	..
	45–59	82 (45–119)	187 (127–246)	105 (37–172)	0·003	..
	60–74	155 (90–220)	386 (242–529)	231 (79–382)	0·004	..
	≥75	210 (104–316)	654 (338–970)	444 (123–765)	0·008	..

Data are rates per 10 000 (95% CI) unless otherwise stated. NA=not applicable.

^*From Student's t-tests for differences in attendance rates.

^†For age, interaction was tested between those younger than 45 years and those aged 45 years and older.²²