Table 3– Multiple linear regression model describing predictors of sputum neutrophil percentages in all subjects with asthma

	Unadjusted model		Final model (R²=0.108, p=0.004)
	β-coefficient (95% CI)	p-value	β-coefficient (95% CI)	p-value
Age yrs	0.395 (0.085–0.704)	0.013	0.330 (0.022–0.639)	0.036
Sex	0.108 (-9.486–9.702)	0.982
BMI kg·m⁻²	0.937 (0.238–1.635)	0.009	0.801 (0.102–1.499)	0.025
Total SFA mg·L⁻¹	0.017 (-0.002–0.036)	0.075
Total MUFA mg·L⁻¹	0.016 (-0.001–−0.032)	0.062
Total PUFA mg·L⁻¹	0.003 (-0.014–0.019)	0.760
ICS dose^# μg·day⁻¹	0.003 (-0.002–0.009)	0.235
Use of ICS treatment yes/no	4.831 (-4.515–14.177)	0.308

BMI: body mass index; SFA: saturated fatty acids; MUFA: monounsaturated fatty acids; PUFA: polyunsaturated fatty acids; ICS: inhaled corticosteroid. ^#: beclomethasone equivalents.