Table 4 Utilization trend of WM gynecology outpatient clinics and the associations between WM use and patients’ characteristics

Time periods of follow-up phase, months

 1–6

[Reference]

[Reference]

 7–12

0.88^a (0.86–0.90)

0.87 (0.85–0.88)

 13–18

0.90 (0.89–0.92)

0.88 (0.86–0.90)

 18–24

0.87 (0.85–0.89)

0.85 (0.83–0.86)

 25–30

0.88 (0.86–0.90)

0.85 (0.83–0.86)

 31–36

0.87 (0.85–0.88)

0.83 (0.81–0.85)

 37–42

0.86 (0.84–0.88)

0.82 (0.81–0.84)

 43–48

0.88 (0.86–0.90)

0.84 (0.82–0.86)

 49–54

0.88 (0.86–0.90)

0.84 (0.82–0.86)

 55–60

0.87 (0.85–0.89)

0.82 (0.80–0.84)

Patients’ characteristics

 Age

  15–39

[Reference]

[Reference]

  40–50

1.06 (1.05–1.08)

1.01 (1.00–1.03)

Residence

 Rural

[Reference]

[Reference]

 Urban

0.98 (0.96–1.00)

0.99 (0.98–1.01)

Insurance premium, NT$

 Fixed premium and dependents

[Reference]

[Reference]

  < 20 000

0.95 (0.93–0.97)

0.96 (0.94–0.98)

 20,000–39,999

0.92 (0.90–0.94)

0.93 (0.91–0.95)

  ≥ 40,000

0.89 (0.87–0.91)

0.89 (0.87–0.91)

 Health prevention practices^b, Yes vs. No

1.21 (1.19–1.23)

1.22 (1.20–1.24)

 Infertility, Yes vs. No

1.34 (1.3–1.39)

1.41 (1.37–1.46)

 Baby delivery, Yes vs. No

0.91 (0.88–0.95)

0.90 (0.87–0.94)

 Ob/Gyn^c inpatient, Yes vs. No

2.01 (1.95–2.07)

1.90 (1.84–1.96)

 Traditional Chinese medicine utilization

0.83 (0.83–0.84)

0.84 (0.83–0.85)