Fig. 2From: The association of body mass index with difficult tracheal intubation management by direct laryngoscopy: a meta-analysisThe result is the pooled estimate of the 5 included studies by random effect model. RR: rate ratios. There was a statistically significant association pooled (RR = 2.04, 95% CI: 1.16–3.59, p = 0.01; I2 = 71%, p = 0.008, Power = 1.0) between obesity and risk of DIBack to article page