Comparison of concentration of cytokines in BAL fluid obtained from left and right sides
| Correlation | Bland-Altman analysis | |||||
|---|---|---|---|---|---|---|
| R | p value | Difference (95% CI) | LLA (95% CI) | ULA (95% CI) | ||
| IL-8 | 0.66 | p<0.001 | 0.04 (–1.34 to 1.43) | –11.9 (–9.6 to –14.3) | 12.0 (9.6 to 14.4) | |
| IL-6 | 0.42 | p<0.001 | –0.25 (–0.77 to 0.27) | –4.7 (–3.8 to –5.6) | 4.15 (3.3 to 5.1) | |
| TNFα | 0.39 | p<0.001 | 0.04 (–0.06 to 0.15) | –0.84 (–0.66 to–1.0) | 0.92 (0.74 to 1.1) | |
Concentrations of cytokines were analysed using Pearson's coefficient (R) and by Bland-Altman plots of agreement. The mean difference in cytokine concentration between the right and left sides together with the lower (LLA) and upper (ULA) limits of agreement with 95% confidence intervals are given.