Prediction equations of maximal respiratory pressures for adults aged 18–80 yrs
| RSD | R2 | ||
| MEP=9.887–(0.055×A)+(0.035×W)+(5.224×S)–(0.049×S×A) | (6) | 2.23 | 50% |
| (1.083) (0.011) (0.013) (0.897) (0.017) | |||
| MEPw=0.35+(17.65×S)–(0.091×A×S)+(0.055×H)–(0.055×H×S) | (7) | NA | NA |
| MIP=7.224–(0.040×A)+(0.032×W)+(3.745×S)–(0.041×S×A) | (8) | 1.58 | 51% |
| (0.766) (0.008) (0.009) (0.635) (0.012) | |||
| MIPw=−4.3+(18.5×S)–(0.103×A×S)+(0.071×H)–(0.071×H×S) | (9) | NA | NA |
RSD: residual standard deviation
R2: the percentage explained variance
MEP: maximal expiratory pressure (kPa)
A: age (yrs)
W: weight (kg)
S: sex
w: prediction equations according to 8 presented by sex (S) are combined to one equation (this can easily be checked using S=1 for obtaining the separate equation for males and S=0 for females)
MIP: maximal inspiratory pressure (kPa)
NA: not available (see 8)
Data in the brackets underneath equations 7 and 9 are se values of the regression coefficients