highly significantP = 0.005
After adjusting for the potential confounders, the excess risk of the moderate/severe anemia group relative to the no anemia group remained highly significant (HR: 1.93; 95%CI: 1.21–3.06; P = 0.005), whereas no significant increased risk was observed for the mild anemia group relative to the no anemia group (adjusted HR: 1.15, 95%CI: 0.69–1.91, P = 0.6).