Table 5.

Sensitivity analysis based on the frequency of angina attacks.

	Group	No. of RCTs	No. of patients	MD	95%CI	Z	p (effect)	I2	χ2	p (het)
M scale	0–5	3	342	−2.58	−3.35, −1.81	6.55	<0.00001	77%	8.76	0.01
	1–5	3	342	−2.58	−3.35, −1.81	6.55	<0.00001	77%	8.76	0.01
	2–5	3	342	−2.58	−3.35, −1.81	6.55	<0.00001	77%	8.76	0.01
	3–5	3	342	−2.58	−3.35, −1.81	6.55	<0.00001	77%	8.76	0.01
	4–5	1	60	−4.68	−6.32, −3.04	5.59	<0.00001	/	/	/
	≤ 3	2	282	−2.22	−2.53, −1.90	13.97	<0.00001	0%	0.39	0.53
	> 3	1	60	−4.68	−6.32, −3.04	5.59	<0.00001	/	/	/