Table 1.

Characteristics of the included studies

Study	Country	Follow-up (mo)	Silicone stent (+)			Silicone stent (-)
			Number	Duration (mo)	Success rate (%)	Number	Succes rate (%)
Harugop et al. (2008) [26]	India	16.3	50	3	96.0	240	93.3
Smirnov et al. (2008) [27]	America	6	23	2	78.0	23	100.0
Kakkar et al. (2008) [28]	India	2.5	20	1.5	85.0	20	90.0
Unlu et al. (2009) [19]	Turkey	97	19	2	84.2	19	94.7
Al-Qahtani et al. (2012) [21]	Saudi Arabia	12	92	4	96.0	81	91.0
Chong et al. (2013) [29]	China	12	63	2	96.8	65	95.3
Shashidhar et al. (2014) [30]	India	6	32	1.5	93.8	30	86.7
Reddy et al. (2015) [31]	India	6	10	1.5	90.0	10	80.0
Fayers et al. (2016) [32]	Canada	12	152	3	94.7	148	87.8
Rao et al. (2016) [33]	India	6	25	3	92.0	25	84.0
Ahmad et al. (2016) [34]	India	12	15	1.5	93.3	15	86.6
Smitha et al. (2016) [35]	India	6	30	1.5	85.0	30	90.0