highly significantp < 0.001
Notably, in Model 4, which replaced the PSI score with the CURB-65 score, the prognostic value of LAR remained highly significant and the effect estimates remained stable (30-day HR = 2.52, 95% CI: 1.51–4.21, p < 0.001; 90-day HR = 2.55, 95% CI: 1.59–4.08, p < 0.001), indicating that the independent predictive ability of LAR is robust to the specific disease severity score employed for adjustment.