Performance of self-diagnosis and standby treatment of malaria in international oilfield service employees in the field

Table 2 Cumulative incidence of malaria per 100 persons according to work status in 24 months.

		Cumulative incidence (%) of malaria in 24 months [95%CI]
		Visitor (N = 342)	Rotator (N = 795)	Long term (N = 1122)	p-value*
Malaria	Presumptive	2.3 [0.7–3.9]	6.2 [4.5–7.9]	13.7 [11.7–15.7]	<0.001
	Doctor's diagnosis	2.0 [0.5–3.5]	5.7 [4.1–7.3]	12.8 [10.8–14.8]	<0.001
	Laboratory confirmed	1.8 [0.4–3.2]	4.3 [2.9–5.7]	9.7 [8.0–11.4]	<0.001
Hospitalization for malaria	Doctor's diagnosis	0.6 [0.0–1.4]	1.6 [0.7–2.5]	1.5 [0.8–2.2]	0.6
	Laboratory confirmed	0.6 [0.0–1.4]	1.6 [0.7–2.5]	1.2 [0.6–1.8]	0.5

*p-value for malaria diagnosis was obtained by χ²-test and for hospitalization with Fisher's exact test. Those who responded to belong to the 'other' group (N = 91), instead of the solicited groups, were excluded as their global time of possible exposure to malaria was unclear.

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