CRP and retinitis pigmentosa 1: In addition, NLR ≥ 5.22 [OR 7.759 (95% CI: 1.434, 41.989), P = 0.017, Table 3 and Additional file 1: Fig. S1] and CRP > 8 mg/l [OR 7.321 (95% CI: 1.442, 37.171), P = 0.016] were also standalone risk factors for RP-ILD.