Table 4.

Association between having had prior screening and the presence of HSIL+ (squamous or glandular) stratified by age group. State of Maranhão, Brazil. 2007 to 2012

Had prior screening	Yes		No		OR	95%CI	p-value
	n	%	n	%
< 25 years
No	35	0.0	87,362	100.0	Reference
Yes	74	0.1	113,252	99.9	1.6	1.09–2.44	< 0.001
25–64 years
No	436	0.3	129,731	99.7	Reference
Yes	1,992	0.3	665,237	99.7	0. 9	0.80–0.98	< 0.001
≥65 years
No	81	1.1	7,570	98.9	Reference
Yes	239	0.8	29,502	99.2	0.8	0.59–0.97	< 0.001

OR odds ratio, 95%CI 95 % confidence interval