Table 1. Characteristics of cases of invasive cervix carcinoma and controls.

	HPV tested		HPV positive				Agea		Age at sexual debuta
	Cases	Controls	Cases	%	Controls	%	Cases	Controls	Cases	Controls
Country	1864	1719	1769	94.9	285	16.6	49	48	17	19
Algeria	142	145	132	93.0	18	12.4	53.5	52	16	18
Morocco	188	176	182	96.8	38	21.6	49	40	16	18
Madras (India)	187	184	180	96.3	51	27.7	48	46.5	17	18
Philippines	364	380	349	95.9	35	9.2	47.5	47	19	21
Thailand	378	259	363	96.0	41	15.8	49.5	50	18	20
Brazil	187	190	181	96.8	32	16.8	51	52	18	19
Colombia	110	124	87	79.1	21	16.9	46	45.5	17	18
Paraguay	112	86	109	97.3	18	20.9	48.5	45.5	16	19
Peru	196	175	186	94.9	31	17.7	48	48	16	18

Abbreviation: HPV=human papillomavirus.

^aMedian.