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Table 3 Performance of K-CFS against that of K-FRAIL, KG-7, Korean frailty index, and ECOG and Pearson’s correlations between K-CFS and other scales

From: Translation and validation of the Korean version of the clinical frailty scale in older patients

  1 Very fit 2 Well 3 Managing well 4 Vulnerable 5 Mildly frail 6 Moderately frail 7 Severely frail 8 Very severely frail 9 Terminally ill Ra Rsa
K-FRAIL           0.8053* 0.8048*
 Mean (SD) 0.3 (0.5) 0.7 (0.8) 0.8 (1.3) 1.3 (0.9) 3.3 (0.9) 3.8 (0.4) 3.5 (1.0) 3.7 (0.5) 2.9 (1.2)   
 Median (IQR) 0 (0–1) 0.5 (0–1) 0 (0–1) 1 (1–2) 3.5 (3–4) 4 (4–4) 4 (3–4) 4 (3–4) 3 (2–3.5)   
KG-7           −0.8846* −0.8860*
 Mean (SD) 6.7 (0.7) 5.4 (1.2) 5.5 (1.0) 4.3 (1.1) 3.4 (0.7) 1.8 (1.0) 1.0 (1.2) 0.8 (1.0) 3.9 (2.0)   
 Median (IQR) 7 (7–7) 5 (5–6.5) 6 (5–6) 4 (3–5) 3.5 (3–4) 1.5 (1–2) 1 (0–1) 1 (0–1) 3.5 (2–5.5)   
Korean frailty index           0.7742* 0.7883*
 Mean (SD) 1.2 (1.3) 3.3 (1.4) 2.2 (1.4) 4.3 (1.4) 5.8 (1.1) 5.2 (0.9) 6.2 (1.2) 6.8 (1.1) 4.9 (1.5)   
 Median (IQR) 1 (0–2) 3 (2–5) 3 (1–3) 4 (3–5.5) 6 (5.5–6) 5.5 (4–6) 6.5 (5–7) 7 (6–8) 5 (3.5–6)   
ECOG PS          0.9190* 0.9184*
 0 8 (80.0) 3 (25.0) 2 (18.2) 1 (6.3) 0 0 0 0 1 (12.5)   
 1 2 (20.0) 9 (75.0) 9 (81.8) 13 (81.3) 1 (8.3) 1 (8.3) 0 0 2 (25.0)   
 2 0 0 0 2 (12.5) 8 (66.7) 8 (66.8) 2 (20.0) 0 4 (50.0)   
 3 0 0 0 0 3 (25.0) 8 (80.0) 8 (80.0) 3 (30.0) 1 (12.5)   
 4 0 0 0 0 0 0 0 7 (70.0) 0   
  1. K-CFS Clinical Frailty Scale-Korean, K-FRAIL Korean version of the fatigue, resistance, ambulation, illness, and loss of weight, KG-7 Korean Cancer Study Group Geriatric Score, ECOG PS Eastern Cooperative Oncology Group Performance Status
  2. R and Rs were calculated using Pearson correlation and Spearman correlation, respectively
  3. P for trends for all the variables were statistically significant (p < 0.001)
  4. We excluded participants who were assigned to scale 9 (terminally ill) on the Clinical Frailty Scale-Korean
  5. *p < 0.01