Table 1.
Baseline characteristics of the development and validation cohorts.
Table 2.
Weights for comorbidities in the development cohort.
Fig 1.
Distribution of the CCI and mCCI-IHD scores for the development cohort.
(A) Distribution of the CCI scores (n = 18,872), excluding patients with no comorbidity (n = 5,866). (B) Distribution of the mCCI-IHD scores (n = 18,087), excluding patients with no comorbidity (n = 6,651). The y-axis shows the number of subjects. The solid line represents a density curve, calculated by approximation, to identify the overall pattern and deviation. The vertical dotted lines (red) represents the 50th and 90th percentile values. CCI, Charlson comorbidity index; mCCI-IHD, modified Charlson comorbidity index for incident hemodialysis patients.
Fig 2.
Survival curves obtained using the Kaplan-Meier method in the development cohort differentiated by 4 risk groups for CCI (A) and mCCI-IHD (B).
CCI, no comorbidity (n = 5,866, score 2); ≤50th percentile (n = 10,501, scores 3–4); 50th-90th percentile (n = 6,663, scores 5–6); and >90th percentile (n = 1,708, score ≥7). mCCI-IHD, no comorbidity (n = 6,651, score 0); ≤50th percentile (n = 9,740, scores 1–4); 50th-90th percentile (n = 7,072, scores 5–9); and >90th percentile (n = 1,275, score ≥10). CCI, Charlson comorbidity index; mCCI-IHD, modified Charlson comorbidity index for incident hemodialysis patients.
Fig 3.
Survival curves obtained using the Kaplan-Meier method (A and B) and Cox regression analysis (C and D) in the validation cohort differentiated by the 4 risk groups of CCI (A and C) and mCCI-IHD (B and D).
CCI, score 2 (n = 236, 21.5%); scores 3–4 (n = 537, 48.8%); scores 5–6 (n = 234, 21.3%); and score ≥7 (n = 93, 8.5%). mCCI-IHD, score 0 (n = 247, 22.5%); scores 1–4 (n = 480, 43.6%); scores 5–9 (n = 290, 26.4%); and score ≥10 (n = 83, 7.5%). aAdjusted for age, sex, health security system, timing of referral to nephrologist, primary cause of end-stage renal disease, body mass index, hemoglobin, albumin, calcium, and phosphorus. CCI, Charlson comorbidity index; mCCI-IHD, modified Charlson comorbidity index for incident hemodialysis patients.
Table 3.
Model performance of the mCCI-IHD at various time points during the follow-up of the validation cohort.