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

Table 2

Crude/adjusted hazard ratios and 95% confidence intervals for undergoing surgery.

	Crude		Adjusted^a
	HR	(95% CI)	HR	(95% CI)
CM
No	1.00	(Reference)	1.00	(Reference)
Yes	0.20	(0.18–0.21)***	0.18	(0.17–0.19)***
Age, years
<30	1.00	(Reference)	1.00	(Reference)
30–39	2.65	(2.24–3.14)***	2.36	(1.99–2.80)***
40–49	3.00	(2.54–3.54)***	2.54	(2.15–3.00)***
≥50	1.35	(1.11–1.64)**	1.24	(1.02–1.51)*
Occupational status
White collar	1.00	(Reference)	1.00	(Reference)
Blue collar	1.18	(1.11–1.27)***	1.15	(1.07–1.23)***
Others	0.99	(0.89–1.11)	0.90	(0.81–1.01)
Area
Northern Taiwan	1.00	(Reference)	1.00	(Reference)
Central Taiwan	1.25	(1.15–1.37)***	1.51	(1.38–1.65)***
Southern Taiwan	1.20	(1.12–1.30)***	1.26	(1.17–1.36)***
Eastern Taiwan and offshore islands	1.09	(0.93–1.29)	1.03	(0.87–1.22)
Co-morbidity (versus no)
Excessive menstruation	1.34	(1.25–1.44)***	1.26	(1.17–1.36)***
Iron-deficiency anemia	1.61	(1.48–1.75)***	1.56	(1.43–1.70)***
Dysmenorrhea	1.23	(1.14–1.32)***	1.35	(1.25–1.47)***
Infertility	0.68	(0.12–1.09)	—

^aAdjusted for age, occupation, area, excessive menstruation, iron-deficiency anemia, and dysmenorrhea.
** 𝑃<0.01 and ***𝑃<0.0001.