Table 2. Predicted hazard of symptomatic malaria across follow-up periods.

	1-Month aHR (95% CI)	3-Month aHR (95% CI)	6-Month aHR (95% CI)	12-Month aHR (95% CI)	29-Month aHR (95% CI)
Main exposure
No infection	Ref	Ref	Ref	Ref	Ref
Asymptomatic infection	2.61 (2.05, 3.33)	1.64 (1.40, 1.94)	1.38 (1.20, 1.58)	1.12 (1.00, 1.25)	1.11 (1.01, 1.22)
Age
<5 years	Ref	Ref	Ref	Ref	Ref
5 to 15 years	1.37 (0.90, 2.08)	1.61 (1.00, 2.61)	1.99 (1.07, 3.71)	2.37 (0.97, 5.77)	2.52 (1.26, 5.01)
>15 years	0.56 (0.36, 0.88)	0.74 (0.46, 1.21)	0.83 (0.44, 1.53)	0.88 (0.37, 2.08)	0.97 (0.51, 1.84)
Sex
Male	Ref	Ref	Ref	Ref	Ref
Female	0.93 (0.70, 1.24)	0.84 (0.61, 1.16)	0.80 (0.53, 1.20)	0.68 (0.38, 1.21)	0.63 (0.40, 0.99)
Regular bed net usage*
No	Ref	Ref	Ref	Ref	Ref
Yes	1.00 (0.70, 1.43)	0.81 (0.55, 1.20)	0.70 (0.43, 1.16)	0.59 (0.29, 1.21)	0.52 (0.30, 0.89)
Village
Kinesamo	Ref	Ref	Ref	Ref	Ref
Maruti	1.08 (0.77, 1.52)	1.11 (0.75, 1.64)	1.14 (0.69, 1.88)	1.13 (0.56, 2.31)	1.09 (0.64, 1.85)
Sitabicha	0.72 (0.49, 1.05)	0.80 (0.53, 1.21)	0.76 (0.45, 1.29)	0.73 (0.35, 1.51)	0.70 (0.40, 1.23)

Abbreviations: CI, confidence interval; aHR, adjusted hazard ratio; Ref, reference.

*Regular bed net usage was defined as a person averaging > 5 nights a week sleeping under a bed net.

Significant estimates are bolded.