Table 1. Demographic characteristics of study subjects, Papua New Guinea, 2010.

Demographic characteristic		Cases		Controls
		n = 7	(%)	n = 36	(%)
Sex	Male	5	(71)	16	(44)
Age group	20–29	3	(43)	12	(33)
	30–39	3	(43)	10	(28)
	40–49	0	(0)	12	(33)
	50–59	1	(14)	2	(6)