Table 3.
Adjusted odds ratio for presence of interstitial lung disease
| Total cohort | Confirmed RA subgroup | Unconfirmed RA subgroup | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | p value | 95% CI | OR | p value | 95% CI | OR | p value | 95% CI | |||
| Age | 1.052 | < 0.001 | 1.031–1.072 | 1.036 | 0.021 | 1.005–1.068 | 1.063 | < 0.001 | 1.035–1.091 | ||
| Tobacco | 1.896 | 0.019 | 1.113–3.229 | 3.468 | 0.005 | 1.456–8.259 | 1.221 | 0.582 | 0.599–2.487 | ||
| RA | 1.613 | 0.187 | 0.793–3.279 | Not applicable | Not applicable | ||||||
| Anti-CCP quartile* | 1.47 | 0.009 | 1.101–1.965 | 1.407 | 0.047 | 1.005–1.969 | 1.648 | 0.055 | 0.988–2.747 | ||
*
Odds ratio is reported for every increase in quartile group of anti-CCP U/mL defined as 0–5 U/mL (negative titer), 6–149 U/mL (low titer), 150–299 U/ mL (moderate titer), and 300 U/mL or greater (high titer)