Table 2.

Baseline characteristics of the cervical cancer screening cohort (n=324,548)

Patient CharacteristicsCKD
No CKD, n=308,065Stages 3a and 3b, n=10,999Stages 4 and 5, n=723Dialysis,an=3811Transplant, n=950
Age groups, yr
 21–3032,091 (10.4)55 (0.5)<6 (0.8)137 (3.6)72 (7.6)
 31–4053,055 (17.2)172 (1.6)28 (3.9)260 (6.8)183 (19.3)
 41–5075,939 (24.7)519 (4.7)64 (8.9)539 (14.1)253 (26.6)
 51–6079,749 (25.9)2320 (21.1)153 (21.2)1056 (27.7)266 (28.0)
 61–7067,231 (21.8)7933 (72.1)471 (65.1)1819 (47.7)176 (18.5)
Age, yrb48.8 (12.9)62.8 (7.4)61.0 (9.4)56.8 (11.3)48.7 (12.0)
Income quintilec
 1 (Lowest)60,119 (19.5)2343 (21.3)200 (27.7)1189 (31.2)228 (24.0)
 264,607 (21.0)2472 (22.5)161 (22.3)869 (22.8)191 (20.1)
 364,176 (20.8)2250 (20.5)148 (20.5)710 (18.6)187 (19.7)
 462,455 (20.3)2062 (18.7)122 (16.9)581 (15.2)175 (18.4)
 5 (Highest)56,708 (18.4)1872 (17.0)92 (12.7)462 (12.1)169 (17.8)
Rural residential statusd19,196 (6.2)1198 (10.9)63 (8.7)527 (13.8)85 (8.9)
Comorbidities
 Charlson comorbidity indexe
  0–1296,197 (96.1)9096 (82.7)443 (61.3)266 (7.0)122 (12.8)
  27837 (2.5)971 (8.8)93 (12.9)879 (23.1)451 (47.5)
  ≥34031 (1.3)932 (8.5)187 (25.9)2666 (70.0)377 (39.7)
 Diabetes62,883 (20.4)4255 (38.7)360 (49.8)2339 (61.4)296 (31.2)
 Hypertension118,726 (38.5)8659 (78.7)630 (87.1)3357 (88.1)789 (83.1)
 Myocardial infarction1902 (0.6)343 (3.1)39 (5.4)456 (12.0)24 (2.5)
 Hemorrhagic stroke282 (0.1)28 (0.3)<6 (0.8)20 (0.5)<6 (1.8)
 Ischemic stroke816 (0.3)176 (1.6)11 (1.5)199 (5.2)10 (1.1)
 Dementia3227 (1.0)354 (3.2)29 (3.2)198 (5.2)11 (1.2)
 Depression36,252 (11.8)1368 (12.4)100 (13.8)597 (15.7)110 (11.6)
Health care utilization
 General practitioner visits in the previous 1 yr
  Mean (SD)8.61 (7.58)10.32 (9.20)12.35 (12.39)13.46 (16.89)6.14 (8.00)
  Median (IQR)7 (4–11)8 (5–13)9 (5–15)8 (3–17)4 (2–8)
 Long–term care status in previous 90 d905 (0.3)101 (0.9)13 (1.8)127 (3.3)3 (0.3)
  • Values are n (%) unless otherwise noted. IQR, interquartile range.

  • a The mean (SD) dialysis vintage was 1.20 (2.10) years. The median (IQR) dialysis vintage was 0.3 (0.3–1.0) years.

  • b Values are mean (SD).

  • c Income quintile category 3 includes the missing values.

  • d Rural defined as population <10,000.

  • e Patients with no hospitalizations (i.e., missing Charlson score) were coded as zero.