Fig. 1

Survival curves by laboratory index (LI) comprising 14 commonly used laboratory tests during the 18-year follow-up. The number of laboratory tests outside reference ranges by categories of LI: 0–0.08 ≤ 1; 0.09–0.14 = 2; 0.15–0.21 = 3; 0.22–0.42 = 4–5; 0.43– ≥ 6