Table 3.

Results of the general linear model^a to predict PIF_EH in 93 patients with COPD. For the full model, r² = 0.18 (P = 0.0014)

Parameter	Coefficient	Standard error	P
Intercept	71.7	13.0	<0.0001
Age, years	−0.34	0.15	0.022
Gender
female	−6.89	2.62	0.010
male	0.00
FEV1, percent predicted	0.089	0.077	0.25
Weight, kg	0.047	0.058	0.42

Notes:

^ay = b₀ + b₁x₁ + b₂x₂ + ... b_kx_k, where x_1...k are the explanatory parameters and b_1...k are their regression coefficients; see text for an example.

Abbreviations: FEV₁, forced expiratory volume in 1 s; PIF_EH, peak inspiratory flow through the easyhaler.