Table 1.

Incidence rates and Rate Ratios (RRs) comparing the week before home visit (days 0–6) with 2 weeks before home visit (days 7–13)^a

	Asembo			Kibera
	Incidence, days 0–6, number of episodes person-year (95% CI)	Incidence, days 7–13, number of episodes/ person-year (95% CI)	RR comparing days 0–6 with days 7–13b (95% CI)	Incidence, days 0–6, number of episodes/ person-year (95% CI)	Incidence, days 7–13, number of episodes/ person-year (95% CI)	RR comparing days 0–6 with days 7–13b (95% CI)	Ratio of RRs comparing days 0–6 with days 7–13, Asembo vs Kiberab (95% CI)
Persons ≥5 years of age
Fever	3.79 (3.70–3.89)	1.56 (1.52–1.60)	2.53 (2.45–2.62)	0.58 (0.56–0.61)	0.33 (0.31–0.35)	1.84 (1.72–1.97)	1.37 (1.28–1.48)
Diarrhoea	0.46 (0.44–0.48)	0.23 (0.21–0.24)	2.13 (2.00–2.27)	0.15 (0.13–0.16)	0.086 (0.077–0.095)	1.77 (1.56–2.01)	1.20 (1.05–1.38)
Cough	4.08 (3.97–4.18)	1.99 (1.93–2.04)	2.14 (2.07–2.21)	0.84 (0.81–0.87)	0.58 (0.56–0.61)	1.49 (1.41–1.57)	1.44 (1.35–1.53)
Children <5 years of age
Fever	9.76 (9.38–10.15)	2.76 (2.63–2.88)	3.54 (3.36–3.73)	2.38 (2.25–2.50)	1.15 (1.07–1.22)	2.07 (1.92–2.24)	1.71 (1.56–1.88)
Diarrhoea	1.72 (1.61–1.84)	0.72 (0.66–0.78)	2.39 (2.20–2.59)	1.46 (1.37–1.56)	0.79 (0.73–0.86)	1.84 (1.68–2.02)	1.30 (1.15–1.47)
Cough	9.63 (9.24–10.03)	2.79 (2.66–2.93)	3.45 (3.27–3.64)	3.20 (3.05–3.36)	1.77 (1.67–1.88)	1.81 (1.69–1.93)	1.91 (1.75–2.08)

^aAsembo, rural western Kenya and Kibera, Urban Nairobi. Data from 1 July 2006 to 30 June 2007.

^bModel for persons ≥5 years controls for proxy vs self-report.