Table 3.

Summary of sensitivity analysis of the included studies

Excluded Studies	Pooled mean [F−] in mg/l (95% CI)	I2 (95% CI)	P-value
T. Rango et al.,2014 [22]	6.40 [4.70, 8.09]	97 [96,98]	< 0.001
T. Rangoa et al.,2012 [7]	6.16 [4.75, 7.58]	95 [93,97]	< 0.001
Aweke K.,et al., 2016 [19]	6.62 [4.98,8.27]	97 [96,98]	< 0.001
T. Rango et al.,2018 [11]	6.64 [4.88, 8.39]	97 [96,98]	< 0.001
Wondwossen et al.,2004 [14]	6.63 [4.85, 8.41]	97 [96,98]	< 0.001
Tekle-Haimanot R. et.al, 1987 [20]	6.33 [4.63, 8.03]	96 [94,97]	< 0.001
Tenalem Ayenew,2008 [22]	6.86 [4.61, 9.11]	97 [96,98]	< 0.001
Christopher J. et.al, 2018 [23]	6.82 [5.00, 8.63]	96 [94,97]	< 0.001
Muhammed Haji,et al.,2018 [18]	7.10 [5.50, 8.70]	97 [96,98]	< 0.001
Tesfaw A, Feleke Z,2011 [10]	6.91 [5.12, 8.69]	97 [96,98]	< 0.001
Redda, Gebeyehu H,2014 [24]	6.36 [4.65,8.07]	97 [96,98]	< 0.001