Table 1 Characteristics of patients with pelvic inflammatory disease and comparison subjects

No.

32,268

32,268

Age (years) ^a

34.48 (27.46 – 42.06)

34.48 (27.47 – 42.06)

0.972

Distribution of age

>0.999

 20 – 39

22,221 (68.86)

22,221 (68.86)

 40 – 59

9299 (28.82)

9299 (28.82)

  > 60

748 (2.32)

748 (2.32)

Comorbidities

 Hypertension

1985 (6.15)

1640 (5.08)

<0.001^b

 Diabetes mellitus

1452 (4.50)

1106 (3.43)

< 0.001^b

 Dyslipidemia

1816 (5.63)

1266 (3.92)

< 0.001^b

 Coronary artery disease

51 (0.16)

37 (0.11)

0.137

 Congestive heart failure

181 (0.56)

132 (0.41)

0.006^b

 Cerebrovascular disease

437 (1.35)

348 (1.08)

0.002^b

 Chronic pulmonary disease

1684 (5.22)

1230 (3.81)

< 0.001^b

Degree of urbanization

< 0.001^b

 Urban

20,634 (63.95)

21,167 (65.60)

 Suburban

8,998(27.89)

8,632 (26.75)

 Rural

2,159 (6.69)

1,971 (6.11)

Income group

< 0.001^b

 Low income

13,021 (40.35)

13,978 (43.32)

 Median income

15,719 (48.71)

13,016 (40.34)

 High income

3,528 (10.93)

5,274 (16.34)

Follow-up, years ^a

8.84 (8.04 – 9.51)

8.84 (8.04 – 9.51)

>0.999

 Ovarian cancer

34 (0.11)

24 (0.07)

0.192

 Breast cancer

228 (0.71)

222 (0.69)

0.777

 Uterine cancer

35 (0.11)

27 (0.08)

0.313

 Ovarian cancer

45.50 (40.75 – 59.00)

46.50 (41.25 – 51.75)

0.183

 Breast cancer

46.00 (40.00 – 52.00)

45.00 (41.00 – 50.00)

0.397

 Uterine cancer

47.00 (40.00 – 56.00)

52.00 (45.00 – 55.00)

0.222