Table 4– Multiple linear regression model describing predictors of sputum neutrophil percentages in females with asthma

	Unadjusted model		Final model (R²=0.102, p=0.009)
	β-coefficient (95% CI)	p-value	β-coefficient (95% CI)	p-value
Age yrs	0.419 (0.025–0.814)	0.037
BMI kg·m⁻²	1.015 (0.258–1.772)	0.009	1.015 (0.258–1.772)	0.009
Total SFA mg·L⁻¹	0.003 (-0.023–0.028)	0.840
Total MUFA mg·L⁻¹	0.013 (-0.010–0.035)	0.261
Total PUFA mg·L⁻¹	-0.008 (-0.029–0.013)	0.456
ICS dose^# μg·day⁻¹	0.004 (-0.002–0.011)	0.173
Use of ICS treatment yes/no	8.508 (-3.147–20.163)	0.150

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