Included research	Sample size		Intervention measure		Outcome indicator
Included research	Experimental group	Control group	Experimental group	Control group	Outcome indicator
Liu et al. [10] 2015	85	85	I	II	a
Elli et al. [11] 2016	77	44	I	II	a
Baldinelli et al. [12] 2015	42	48	I	II	a
Lei Wenlan et al. [13] 2016	130	130	I	II	a
Pan Longfang et al. [14] 2015	90	90	I	II	a, b, c
Zhu Ya et al. [15] 2010	65	64	I	II	a
Lin Cuifang et al. [16] 2015	60	60	I	II	a, b
Zhang Ronghua et al. [17] 2015	45	45	I	II	a
Zhou Lianqing et al. [18] 2013	51	49	I	II	a, c
Zhuo Yajuan et al. [19] 2014	60	60	I	II	a, b
Xu Mingming et al. [20] 2012	70	70	I	II	a, b
Jiang Guichun et al. [21] 2016	500	500	I	II	a
Wang Chaohong et al. [22] 2016	43	40	I	II	a, b
Li Xiangjun et al. [23] 2016	98	106	I	II	a
Zheng Chunhua et al. [24] 2016	60	60	I	II	a
Ren Xiaomin et al. [25] 2016	35	35	I	II	a, c