Table 2.

Association between serum immunoglobulins and prevalent pneumonia.

	N events/total	Odds Ratio (95% Confidence Interval)
		Model 1	Model 2	Model 3
IgA	43/8,765	1.16 (0.93-1.43)	1.18 (0.95-1.46)	1.18 (0.94-1.47)
IgG	43/8,755	1.01 (0.89-1.14)	1.02 (0.90-1.15)	1.03 (0.91-1.16)
IgM	43/8,761	1.03 (0.84-1.27)	1.04 (0.85-1.27)	1.03 (0.83-1.28)

Model 1 was adjusted for age and sex; Model 2 was adjusted for model 1, smoking status, pack years, and alcohol consumption; Model 3 was adjusted for model 2, BMI, DM, asthma, COPD, hypertension, physical activity, and serum CRP.

N events/total refers to the number of participants with prevalent pneumonia and the total number of participants included in the analyses.

IgA/IgG/IgM, immunoglobulin A/G/M; BMI, body mass index; DM, diabetes mellitus; COPD, chronic obstructive pulmonary disease; CRP, C-reactive protein.