Table 2.

Results of Meta-analysis of systolic blood pressure

Study	| SMD	[95% Conf. Interval]		% Weight
Carter (1997) [8]	| -0.173	− 0.723	0.377	10.66
Carter (2009) [15]	| -0.596	−0.796	− 0.396	16.73
Schumacher (2018)	| -0.696	−0.927	−0.465	16.26
Korcegez (2017)	| -0.574	−0.899	− 0.250	14.65
Domingues (2017) [40]	| -0.301	−0.732	0.129	12.73
Javaid (2019) [42]	| -1.456	−1.844	−1.067	13.49
Shao (2017)	| -0.148	−0.426	0.131	15.47
D + L pooled RR	| -0.573	−0.851	−0.295	100.00

Heterogeneity chi-squared = 33.52 (d.f. = 6) p = 0.000.

I-squared (variation in SMD attributable to heterogeneity) =82.1%.

Estimate of between-study variance Tau-squared = 0.1096.

Test of SMD = 0: z = 4.04 p = 0.000.

The significance level of the combined effect quantity test: 0.05.

The significance level of the heterogeneity test: 0.1.

Heterogeneity test: p > 0.1, no heterogeneity was considered; p < 0.1, heterogeneity was considered.