Table 3.

Descriptive statistics for the angle of insertion of the masseter muscle relative to Frankfort horizontal plane per vertical group

Outcomes	Norm		Hypo		Hyper
	N, n (min–max)	Pooled mean (95% CI); I2	N, n (min–max)	Pooled mean (95% CI); I2	N, n (min–max)	Pooled mean (95% CI); I2
Masseter angle (°)	3; 103 [9–83]	69.3 (64.2–74.4); I2 = 0.95	3; 81 [5–65]	71.4 (69.2–73.5); I2 = 0.66	3; 48 [6–34]	65.2 (59.3–71.1); I2 = 0.86

N number of studies reporting the outcome in more than 1 patient; n total number of patients in the studies; min–max number of patients in the smallest and the largest study; I² statistic for assessing the between-study heterogeneity (from 0 (no heterogeneity) to 1 (extreme heterogeneity))