Table 3.

HRs for cervical cancer death stratified by age group and stage at diagnosis according to screening history

Variables			No. of CC deaths	Person-years	Death rate per 1,000	HR (95% CI)
Stage at diagnosis1
	CIS
		Never screened	3	37,222.9	0.1	1.00 (reference)
		Screened	7	56,306.3	0.1	1.12 (0.26, 4.82)
	Localized
		Never screened	171	14,257.8	12.0	1.00 (reference)
		Screened	114	19,910.4	5.7	0.41 (0.32, 0.52)
	Regional
		Never screened	306	7,535.2	40.6	1.00 (reference)
		Screened	166	6,233.7	26.6	0.65 (0.54, 0.79)
	Distant
		Never screened	179	1,067.2	167.7	1.00 (reference)
		Screened	84	559.8	150.0	0.88 (0.67, 1.15)
	Unknown
		Never screened	75	2,745.6	27.3	1.00 (reference)
		Screened	57	2,945.5	19.4	0.62 (0.44, 0.89)
Age at diagnosis (yr)2
	30-39
		Never screened	59	17,882.4	3.3	1.00 (reference)
		Screened	11	9,258.3	1.2	0.70 (0.35, 1.39)
	40-49
		Never screened	190	25,928.8	7.3	1.00 (reference)
		Screened	81	33,778.0	2.4	0.71 (0.54, 0.92)
	50-59
		Never screened	184	10,190.1	18.1	1.00 (reference)
		Screened	105	21,097.1	5.0	0.54 (0.42, 0.69)
	60-69
		Never screened	118	5,414.7	21.8	1.00 (reference)
		Screened	97	14,574.5	6.7	0.62 (0.47, 0.82)
	≥70
		Never screened	183	3,412.8	53.6	1.00 (reference)
		Screened	134	7,247.7	18.5	0.61 (0.49, 0.77)

HR, hazard ratio; CC, cervical cancer; CIS, carcinoma in situ; CI, confidence interval.

¹Adjusted for age, socioeconomic status, and histological subtype.

²Adjusted for socioeconomic status, stage, and histological subtype.