Effect of Proprietary Chinese Medicine on Coronary Microvascular Dysfunction in Patients with Microvascular Angina: A Systematic Review and Meta-Analysis

Table 3

Subgroup analysis of IMR based on dosage form, sample size, treatment duration, sex ratio, average age, and location.

Items	Subgroup	n	SMD (95% CI)	I ^2 (%)	z
Dosage form	Pill	3	−1.98 (−3.15, −0.82)	91.8	−3.327	0.001
	Dropping pill	2	−1.75 (−3.82, 0.32)	97.8	−1.655	0.098
	Capsule	1	−1.31 (−1.77, −0.84)	—	−5.515	<0.001
Sample size	≥80	2	−2.06 (−3.52, −0.59)	95.6	−2.756	0.006
	<80	4	−1.65 (−2.64, −0.66)	92.3	−3.276	0.001
Treatment duration	≥6 months	5	−1.51 (−2.29, −0.73)	92.5	−3.801	<0.001
	<6 months	1	−1.79 (−2.58, −1.00)	—	−9.373	<0.001
Sex ratio	F/M ≥ 100%	2	−2.42 (−4.05, −0.79)	92.9	−2.913	0.004
	F/M < 100%	4	−1.49 (−2.47, −0.51)	94.4	−2.981	0.003
Average age	>60	3	−2.24 (−3.79, −0.69)	96.5	−2.834	0.005
	<60	3	−1.34 (−1.63, −1.05)	0.0	−8.960	<0.001
Location	North	3	−2.39 (−3.61, −1.18)	93.8	−3.861	<0.001
	South	3	−1.19 (−1.71, −0.67)	70.4	−4.455	<0.001