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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: Lupus. 2016 Oct 31;26(7):682–689. doi: 10.1177/0961203316672928

Table 4.

Incidence rates (IR) and incidence rate ratios (IRR) of gynecologic visits and procedures associated with use of immunosuppressive drugs (ISD) versus hydroxychloroquine (HCQ) in a propensity-score matched analysis

Immunosuppressive Drugs Hydroxychloroquine
Number Person-
years
IR per 1,000
person-years
(95% CI)
IRR
(95% CI)
Number Person-
years
IR per 1,000
person-years
(95% CI)
IRR
(95%
CI)
Commercial Insurance Plans
  Outpatientgynecology visits 2912 3000 970.82
(936.20–
10006.70)
0.93
(0.88–0.98)
2773 2655 1044.52
(1006.36–1084.13)
Ref.
  Papanicolaou tests 566 3000 188.70
(173.77–204.9)
1.15
(1.01–1.27)
435 2655 163.85
(149.16–180.0)
Ref.
  Colposcopy 90 3000 30.0
(24.40–36.89)
0.93
(0.69–1.25)
86 2655 32.39
(26.22–40.02)
Ref.
  Any gynecologic procedure 679 3000 226.37
(209.97–244.05)
1.13
(1.01–1.27)
521 2655 200.02
(183.71–217.77)
Ref.
Medicaid Insurance*
  Papanicolaou tests 471 3621 130.09
(118.86–142.39)
1.00
(0.94–1.20)
411 3164 129.91
(117.9–143.10)
Ref.
  Colposcopy 121 3621 33.42
(27.97–39.94)
1.31
(0.99–1.74)
81 3164 25.60
(20.59–31.83)
Ref.
  Any gynecologic procedure 618 3621 170.70
(157.75–184.70)
1.10
(0.94–1.20)
507 3164 160.25
(146.89–174.83)
Ref.
*

Number of outpatient gynecologic visits is not available in Medicaid data