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Demographic characteristics of study population correlated to cervical lesion severity

Characteristics	Normal	CIN1	CIN2	CIN3+	χ2	P
CIN1, cervical intraepithelial neoplasia grade 1; CIN2, cervical intraepithelial neoplasia grade 2; CIN3+, cervical intraepithelial neoplasia grade 3 or worse; *, Fisher’s exact test.
Age (year)
≤47	4,885	51	27	14	3.172	0.366
>47	4,367	52	29	21
Education level
No education	607	12	5	2	4.777*	0.171
Educated	8,637	91	51	33
Age at menarche (year)
≤15	5,475	64	28	20	2.394	0.495
>15	3,769	39	28	15
Age at first sexual intercourse (year)
≤22	5,414	63	33	20	0.326	0.955
>22	3,838	40	23	15
No. of sexual partners
≤1	9,112	99	56	34	5.279*	0.109
>1	130	4	0	1
Menopause status
Post-menopause	2,420	30	12	11	4.658*	0.792
Peri-menopause	726	9	2	4
Pre-menopause	6,050	64	42	20