Peak maximal inspiratory mouth pressure (PI,peak) and plateau maximal inspiratory mouth pressure sustained for 1.0 s (PI,max,1.0) measured at residual volume
| Age group yrs | Males | Females | ||||
| Subjects n | PI,peak kPa | PI,max,1.0 kPa | Subjects n | PI,peak kPa | PI,max,1.0 kPa | |
| 10–19 | 25 | 13.0 (7.4) | 10.8 (5.8) | 18 | 10.9 (5.9) | 8.9 (4.4) |
| 20–29 | 84 | 12.6 (7.1) | 10.5 (5.6) | 87 | 9.9 (5.1) | 8.1 (3.8) |
| 30–39 | 55 | 12.2 (6.8) | 10.3 (5.3) | 80 | 9.0 (4.3) | 7.4 (3.2) |
| 40–49 | 30 | 11.8 (6.5) | 10.0 (5.1) | 58 | 8.1 (3.6) | 6.7 (2.6) |
| 50–59 | 13 | 11.4 (6.1) | 9.7 (4.9) | 27 | 7.2 (2.8) | 6.0 (2.0) |
| 60–69 | 14 | 11.0 (5.8) | 9.4 (4.6) | 21 | 6.4 (2.1) | 5.3 (1.5) |
| >70 | 8 | 10.7 (5.5) | 9.1 (4.4) | 13 | 5.5 (1.4) | 4.6 (0.9) |
Data are presented as 50th percentile, i.e. median (5th percentile)