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Table 2 R squared values and percentages of variance explained per comorbidity index

From: The modified functional comorbidity index performed better than the Charlson index and original functional comorbidity index in predicting functional outcome in geriatric rehabilitation: a prospective observational study

Simple linear regressionEMS at discharge
R2 (% of variance)
EMS gain/day
R2 (% of variance)
BI at discharge
R2 (% of variance)
BI gain/day
R2 (% of variance)
CCI0.042 [−0.034–0.118] (4.2%)0.006 [− 0.024–0.036] (0.6%)0.037 [− 0.035–0.109] (3.7%)0.001 [− 0.011–0.013] (0.1%)
Original FCI0.043 [− 0.034–0.120] (4.3%)0.051 [− 0.032–0.134] (5.1%)0.008 [− 0.026–0.042] (0.8%)0.007 [− 0.025–0.039] (0.7%)
Weighted FCI0.216 [0.075–0.357] (21.6%)0.122 [0.003–0.241] (12.2%)0.192 [0.055–0.329] (19.2%)0.036 [− 0.035–0.107] (3.6%)
Multiple linear regression model
 CCI + age & gender0.094 [− 0.011–0.199] (9.4%)0.177 [0.046–0.308] (17.7%)0.107 [− 0.004–0.218] (10.7%)0.125 [0.008–0.242] (12.5%)
 Original FCI + age & gender0.082 [− 0.018–0.342] (8.2%)0.184 [0.051–0.317] (18.4%)0.080 [− 0.019–0.179] (8.0%)0.126 [0.008–0.244] (12.6%)
 w-FCI + age & gender0.246 [0.104–0.388] (21.8%)0.242 [0.101–0.383] (24.3)0.227 [0.087–0.367] (22.7%)0.137 [0.016–0.258] (13.7%)
 CCI + age, gender & function on admission0.423 [0.282–0.564] (42.3%)0.199 [0.065–0.342] (19.9%)0.460 [0.323–0.597] (46.0%)0.131 [0.013–0.249] (13.1%)
 Original FCI + age, gender & function on admission0.423 [0.282–0.564] (42.3%)0.207 [0.072–0.342] (20.7)0.463 [0.326–0.600] (46.3%)0.132 [0.014–0.250] (13.2%)
 w-FCI + age, gender & function on admission0.487 [0.353–0.621] (48.7%)0.291 [0.148–0.434] (29.1%)0.470 [0.334–0.606] (47.0%)0.160 [0.034–0.286] (16.0%)
  1. Abbreviations: EMS elderly mobility scale, FCI functional comorbidity index