Table 1.

Characteristics of collectors and non-collectors at enrollment, western Kenya^*

Characteristic	Collectors	Non-collectors	P
No. enrolled	152	147
Median age, years (range)	29 (18.6–51.5)	28 (18.1–52.2)	0.003
House type
Traditional mud hut (%)	44	46
Semi-permanent (iron sheet roof) (%)	39	41
Permanent (concrete or stone walls) (%)	17	13	0.327
Mosquito coils, insecticide sprays, or repellents used in previous 2 weeks (%)	3	9	0.059
Used bed net previous night (%)	90	90	0.835
Fever in previous 2 weeks (%)	22	22	0.763
Took antimalarial drug in previous 2 weeks (%)	5	8	0.197
Took ACT in previous 2 weeks (%)	4	7	0.083
Plasmodium falciparum parasitemia prevalence (%)	17	17	1.000

^*Differences in age were compared by paired t-test, and differences in house type were compared by ordinal logistic regression controlling for correlation within the matched pairs. Differences in all other variables were compared by McNemar's test. Descriptive statistics include all 152 collectors, and comparisons included only those matched to a non-collector (n = 147). ACT = artemisinin combination therapy.