Evidence-Based Complementary and Alternative Medicine / 2012 / Article / Tab 3

Research Article

Use of Chinese Medicine and Subsequent Surgery in Women with Uterine Fibroid: A Retrospective Cohort Study

Table 3

Incidence and relative incidence of surgery for CM users and nonusers.

CM nonusersCM users IRRb (95% CI)
Patients with surgeryPerson-years IRaPatients with surgeryPerson-years IR

Overall 207419994103.7316079074417.710.17(0.16–0.18)***
Age, years
 <2001440.0008430.00
 20–2966157841.838488499.490.23(0.16–0.31)***
 30–39509539094.436362648424.010.25(0.23–0.29)***
 40–4912819488135.018074131619.530.14(0.13–0.16)***
 ≥50218339464.2380132526.040.09(0.07–0.12)***
Income, US$ per month
 <564.3516540195.54 4062416916.80 0.18(0.15–0.20)***
 564.3–656.54153854107.68 3341807518.48 0.17(0.15–0.20)***
 656.6–779.66715268127.37 4692609517.97 0.14(0.13–0.16)***
 ≥779.7472547086.29 3982240617.76 0.21(0.18–0.24)***
Occupational status
 White collar10941152494.938995209517.260.18(0.17–0.20)***
 Blue collar7796078128.175592982518.740.15(0.13–0.16)***
 Others201239284.03149882416.890.20(0.16–0.25)***
Area
 Northern Taiwan9461116184.766184134914.950.18(0.16–0.20)***
 Central Taiwan3612137168.933681716621.440.13(0.11–0.15)***
 Southern Taiwan6825759118.425492834519.370.16(0.15–0.18)***
 Eastern Taiwan and offshore islands8593590.9172388418.540.20(0.15–0.28)***
Comorbidity
 Excessive menstruation
  No 16531661699.48 10567100514.87 0.15(0.14–0.16)***
  Yes 4213378124.63 5511973927.91 0.22(0.20–0.25)***
 Iron-deficiency anemia
  No 18001805499.70 12257986415.34 0.15(0.14–0.17)***
  Yes 2741940141.24 3821088035.11 0.25(0.21–0.29)***
 Dysmenorrhea
  No 177617481101.60 10727218314.85 0.15(0.14–0.16)***
  Yes 2982512118.63 5351856228.82 0.24(0.21–0.28)***
 Infertility
  No 207219929103.97 15929001117.69 0.17(0.16–0.18)***
  Yes 26530.77 1573320.46 0.67(0.15–2.91)

aIR: incidence rate per 1,000 people.
bIRR: incidence rate ratio, compared to CM nonusers.
*** .

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