Peak expiratory flow(PEF) and forced expiratory volume in 1 s (FEV1) descriptive statistics in subjects with >50 measures#
| PEF L·min−1 | |
| Morning | 327.1±107.4 |
| Evening | 336.8±115.3 |
| FEV1 L | |
| Morning | 2.3±0.7 |
| Evening | 2.4±0.7 |
Data are presented as mean±sd (n = 1,492 morning measures; n = 1,434 evening measures of each parameter). #: n = 19.