Table 2.
Descriptive statistics for the muscle volumes 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 volume (cm3) | 6; 99 [4–33] | 17.2 (14.7–19.7); I2 = 0.96 | 6; 88 [5–22] | 20.8 (15.7–25.9); I2 = 0.98 | 7; 89 [5–25] | 15.7 (12.9–18.4); I2 = 0.95 |
| Lateral pterygoid volume (cm3) | 1; 9 [9–9] | 7.0 (6.3–7.8) | 1; 5 [5–5] | 6.57 (6.1–7.0) | 1; 6 [6–6] | 5.7 (5.1–6.4) |
| Medial pterygoid volume (cm3) | 3; 53 [9–33] | 8.1 (6.3–10.0); I2 = 0.92 | 3; 35 [5–19] | 8.2 (5.3–11.2); I2 = 0.92 | 3; 39 [6–25] | 7.2 (4.4–10.0); I2 = 0.91 |
| Masseter volume_bite (cm3) | 1; 20 [20–20] | 14.9 (14.3–15.5) | 1; 20 [20–20] | 16.7 (16.2–17.2) | 1; 20 [20–20] | 12.7 (12.2–13.2) |
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))