Analysis of epidemiological trends in human papillomavirus infection among gynaecological outpatients in Hangzhou, China, 2011–2015

Table 5 Single and multiple infections in human papillomavirus (HPV)-positive patients in different disease groups

	Cervical cancer^a (n = 915)	CIN3^b (n = 324)	CIN2^c (n = 270)	CIN1^d (n = 1924)	Other diseases^e (n = 40,371)	χ²	P
HPV-positive	889 (97.2)	287 (88.6)	143 (52.7)	978 (50.8)	7455 (18.5)	4557.239	<0.001
Single infections	616 (69.3)	203(70.7)	109 (76.2)	764(78.1)	5970 (80.1)	63.613	<0.001
Multiple infections	273 (30.7)	84(29.3)	34 (23.8)	214(21.9)	1485(19.9)	63.613	<0.001

Pairwise comparisons were performed using the Bonferroni method; α was adjusted with P < 0.01 considered significant. In comparing the rates of single and multiple infections, the following results were found: the difference was significant for a + d (χ² = 18.820, P < 0.001); the difference was significant for a + e (χ² = 55.598, P < 0.001); the difference was significant b + e (χ² = 14.978, P < 0.001)

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