. 2013 Aug 12;8(8):e71910. doi: 10.1371/journal.pone.0071910

Table 3. Meta-analysis results for each outcome.

	Fixed-model	Random-model	Quality-effect model	Heterogeneity	Evidence level
Oropharyngeal leak pressure	MD 0.46, 95%CI (–0.32 1.23)	MD 0.72, 95%CI (–1.10 2.53)	MD 0.61, 95%CI (–0.25 1.46)	I² = 79%, P < 0.00001	Low
Grade 3 and 4 fiberoptic view	RR 0.87, 95%CI (0.76 0.99)	RR 0.88, 95%CI (0.63 1.22)	RR 0.90, 95%CI (0.68 1.19)	I² = 84%, P < 0.0001	Very low
Device insertion time	MD –0.05, 95%CI (–1.16 1.06)	MD –1.30, 95%CI (–4.02 1.44)	MD –0.51, 95%CI (–1.76 0.75)	I² = 75%, P = 0.003	Very low
First attempt insertion success	RR 1.08, 95%CI (1.00 1.16)	RR 1.05, 95%CI (0.97 1.13)	RR 1.04, 95%CI (0.97 1.12)	I² = 69%, P = 0.006	Low
Ease of gastric tube insertion	RR 1.17, 95%CI (1.07 1.29)	RR 1.18, 95%CI (1.06 1.31)	RR 1.18, 95%CI (1.08 1.32)	I² = 45%, P = 0.16	Low
Sore throat	RR 2.55, 95%CI (1.59 4.09)	RR 2.45, 95%CI (1.50 3.99)	RR 2.36, 95%CI (1.43 3.88)	I² = 0%, P = 0.53	Low
Blood on removal	RR 0.62, 95%CI (0.32 1.22)	RR 0.61, 95%CI (0.27 1.41)	RR 0.58 95%CI (0.27 1.22)	I² = 16%, P = 0.31	Low