Table 3

Impact of smoking on positive immune response forpneumococcal serotypes(23F and 6B) in RA patients on methotrexate

B

P-value

Exp(B)

95% CI


Lower

Upper


Smoking (pack-years)

-0.07

0.046

0.93

0.86

0.99


Age (years)

-0.01

0.724

0.99

0.95

1.03


Gender

0.85

0.341

2.34

0.41

13.43


CRP

-0.03

0.639

0.98

0.88

1.08


SJC28*

-0.09

0.502

0.91

0.69

1.20


TJC28*

0.00

1.000

1.0

0.76

1.32


Pre-vaccination antibody levels for serotype 23F

-0.42

0.090

0.66

0.41

1.07


Smoking (ever)

-1.58

0.025

0.21

0.05

0.81


*swollen and tender joint count in 28-joint count index

Two different logistic regression models were created analyzing smoking (pack-years) and smoking (ever) variable, respectively adjusted for the same covariates.

Roseman et al. Arthritis Research & Therapy 2012 14:R170   doi:10.1186/ar3923

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