Anthropometric, pulmonary function and respiratory muscle strength characteristics of both groups
| Variable | MIP20% group | MIP40% group | p-value |
| Sex n (F/M) | 7/7 | 9/6 | ns |
| Age years | 11±2 | 11.6±1.9 | ns |
| Weight kg | 35.8±9.7 | 40±10.5 | ns |
| Height m | 1.43±0.16 | 1.45±0.12 | ns |
| BMI kg·m−2 | 17.2±2.26 | 18.8±2.26 | ns |
| FVC % pred | 103.1±13.3 | 107.9±12.7 | ns |
| FEV1 % pred | 95.3±12.9 | 99.6±10.2 | ns |
| FEV1/FVC % pred | 91±4.9 | 91.9±6.6 | ns |
| MIP % pred | 80.8±18.3 | 87.1±16.5 | ns |
| MEP % pred | 81.7±18.2 | 89±10.5 | ns |
| SNIP % pred | 68.4±15.9# | 78.9±14.6# | ns |
Data are presented as mean±sd unless otherwise stated. MIP: maximal inspiratory pressure; F: female; M: male; ns: nonsignificant; BMI: body mass index; FVC: forced vital capacity; % pred: percentage of predicted value; FEV1: forced expiratory volume in 1 s; MEP: maximal expiratory pressure; SNIP: sniff nasal inspiratory pressure. #: there is no predictive equation defined for SNIP in female children, so data are only shown for males.