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Table 1 Baseline characteristics of participants according to the sarcopenia index

From: Sarcopenia index based on serum creatinine and cystatin C predicts the risk of postoperative complications following hip fracture surgery in older adults

Characteristics Total
n = 897
Internal fixation
n = 556
Joint replacement
n = 341
low muscle mass high muscle mass p low muscle mass high muscle mass p low muscle mass high muscle mass p
Age, years, n(%)    <0.001    0.004    0.053
 60-70 87(19.4) 133(29.7)   55(19.7) 84(30.3)   33(19.3) 48(28.2)  
 >70 362(80.6) 15(70.3)   224(80.3) 193(69.7)   138(80.7) 122(71.8)  
Age, years, mean (SD) 78.3(8.5) 75.5(8.9)   77.9(8.6) 75.3(8.9)   78.8(8.4) 75.9(8.9)  
Sex, n(%)    <0.001    <0.001    <0.001
 male 95(21.2) 211(47.1)   65(23.3) 124(44.8)   30(17.5) 87(51.2)  
 female 354(78.8) 237(52.9)   214(76.7) 153(55.2)   141(82.46) 83(48.8)  
ALB level, g/l, n(%)    <0.001    <0.001    0.027
 <35 g/l 192(42.8) 124(27.7)   121(43.4) 71(25.6)   72(42.1) 52(30.6)  
  ≥ 35 g/l 257(57.2) 324(72.3)   158(56.6) 206(74.4)   99(57.9) 118(69.4)  
BMI, kg/m2, mean (SD) 21.70(3.13) 22.42(3.37) 0.001 21.68(3.12) 22.48(3.47) 0.005 21.74(3.14) 22.32(3.21) 0.095
eGFR, mL/min/1.73 m2, mean (SD) 97.43(31.23) 78.11(25) <0.001 97.54(31.72) 77.61(24.94) <0.001 97.25(30.43) 78.8(25.77) <0.001
Smoking history,n(%)    <0.001    0.163    <0.001
 no 398(88.6) 358(79.9)   238(85.3) 224(80.9)   161(94.2) 133(78.2)  
 yes 51(11.4) 90(20.1)   41(14.7) 53(19.1)   10(5.8) 37(21.8)  
Drinking history,n(%)    <0.001    0.413    <0.001
 no 414(92.2) 378(84.4)   249(89.3) 241(87)   166(97.1) 136(80)  
 yes 35(7.8) 70(15.6)   30(10.7) 36(13)   5(2.9) 34(20)  
Marital status, n(%)    <0.001    0.041    <0.001
 married 325(72.4) 375(83.7)   211(75.6) 229(82.7)   115(67.3) 145(85.3)  
 single or divorced or widowed 124(27.6) 73(16.3)   68(24.4) 48(17.3)   56(32.7) 25(14.7)  
Methods of anesthesia,n(%)    0.589    0.509    0.987
 local anaesthesia 48(10.7) 53(11.8)   34(12.2) 39(14.1)   14(8.2) 14(8.2)  
 general anesthesia 401(89.3) 395(88.2)   245(87.8) 238(85.9)   157(91.8) 156(91.8)  
Hypertension,n(%)    0.969    0.91    0.96
 no 257(57.2) 257(57.4)   178(63.8) 178(64.3)   79(46.2) 79(46.5)  
 yes 192(42.8) 191(42.6)   101(36.2) 99(35.7)   92(53.8) 91(53.5)  
Diabetes,n(%)    0.058    0.026    0.977
 no 365(81.3) 341(76.1)   231(82.8) 208(75.1)   134(78.4) 133(78.2)  
 yes 84(18.7) 107(23.9)   48(17.2) 69(24.9)   37(21.6) 37(21.8)  
CHD,n(%)    0.488    0.279    0.986
 no 423(94.2) 417(93.1)   270(96.8) 263(94.9)   154(90.06) 153(90)  
 yes 26(5.8) 31(6.9)   9(3.2) 14(5.1)   17(9.94) 17(10)  
COPD, n(%)    0.643    0.418    0.772
 no 377(84) 371(82.8)   232(83.2) 223(80.5)   146(85.4) 147(86.5)  
 yes 72(16) 77(17.2)   47(16.8) 54(19.5)   25(14.6) 23(13.5)  
  1. Note:ALB serum albumin; CHD coronary heart disease; COPD chronic obstructive pulmonary disease