Table 3.

Results of multivariable logistic regression formulae for each model

		Model 1			Model 2					Model 3
		Age, Alb, IgG			Age, lung disease, BMI, Lymph, IgG					Age
					GC (–)		GC (+)
		GC (−)	GC (+)		Lung disease		Lung disease			GC (−)	GC (+)
					(−)	(+)	(−)	(+)
α		2.5605	−1.6494		−7.9920	−6.8932	−3.7464	−3.0594		−9.9273	−7.3780
β1	(Age)	0.0742	0.0375	(Age)	0.0756		0.0513		(Age)	0.0885	0.0556
β2	(Alb)	−1.7572	−0.9972	(BMI)	0.2044		−0.1176
β3	(IgG)	−0.0038	−0.0008	(IgG)	−0.0028		−0.0007
β4				(Lymph)	−0.0020		−0.0001

The incidence of pneumocystis pneumonia (p) was calculated using the formula: Ln($\frac{p}{1-p})=$α + β₁ × Age + β₂ × Alb + β₃ × IgG. GC, concomitant glucocorticoid use; Alb, serum albumin (g/dl); IgG, serum IgG (mg/dl); Lymph, lymphocyte count (/μl).