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Table 2 Baseline surfactant protein D in serum (ng/ml) in smokers and non-smokers and according to gender in patients and controls

From: Circulating surfactant protein -D is low and correlates negatively with systemic inflammation in early, untreated rheumatoid arthritis

  RA-patients Controls
Men 760 (665;1059) 967 (921;1024)
Women 674 (613;759) 852 (818;902)
P-value* 0.09 < 0.001
Smokers 850 (686;1014)
(n = 57)
1187 (1099;1293) (n = 482)
Non-smokers 671 (604;738)
(n = 101)
827 (802;852) (n = 991)
P-value* 0.03 < 0.001
  1. Median [95% CI], *Mann-Whitney U-test
  2. RA, rheumatoid arthritis