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Table 1 Demographic and clinical baseline data for the study patients (n = 252), according to physical and mental component summary-36 score quartiles

From: Mortality and health-related quality of life in prevalent dialysis patients: Comparison between 12-items and 36-items short-form health survey

  All patients Physical component summary-36 score quartiles Mental component summary-36 score quartiles
   Q1 Range: 9.6-30.0 Q2 Range: 30.1-35.6 Q3 Range: 35.7-44.4 Q4 Range: 44.5–58.2 P -value Q1 Range: 16.9-39.2 Q2 Range: 39.3-49.0 Q3 Range: 49.1-55.6 Q4 Range: 55.7-70.7 P - value
N 252 63 63 63 63   63 63 63 63  
Age, yrs, (252) 60.2±15.5 60.8±12.4 64.8±14.9 58.1±17.3 57.2±16.0 0.027p 56.5±15.7 63.7±15.3 60.0±17.0 60.6±13.0 0.071p
Male gender,%, (n=252) 65.9 (166) 58.7 (37) 68.3 (43) 69.8 (44) 66.7 (42) 0.5632 61.9 (39) 68.3 (43) 77.8 (49) 55.6 (35) 0.0562
Current smoker, %, (n=252) 25.8 (65) 33.3 (21) 23.8 (15) 22.2 (14) 23.8 (15) 0.466 2 39.7 (25) 22.2 (14) 19.0 (12) 22.2 (14) 0.0342
Work status, %, (n)
Able to work, (n=235) 12.3 (29) 8.5 (5) 5.2 (3) 12.1 (7) 23.3 ( 14) 0.016 2 6.7 (4) 15.3 (9) 12.7 (7) 14.8 (9) 0.4602
Disable to work, (n=235) 51.5 (121) 64.4 (38) 43.1 (25) 50.0 (29) 48.3 (29) 0.118 2 65.0 (39) 35.6 (21) 47.3 (26) 57.4 (35) 0.0092
Retired, (n=235) 36.2 (85) 27.1 (16) 51.7 (30) 37.9 (22) 28.3 (17) 0.02 2 28.3 (17) 49.2 (29) 40.0 (22) 27.9 (17) 0.0452
Cause of renal failure, %, (n)
Glomerulonephritis, (n=249) 20.5 (51) 14.3 (9) 20.6 (13) 19.4 (12) 27.9 (17) 0.311 2 20.6 (13) 12.7 (8) 26.7 (16) 22.2 (14) 0.2762
Diabetic nephropathy, (n=249) 14.1 (35) 22.2 (14) 6.3 (4) 16.1 (10) 11.5 (7) 0.068 2 15.9 (10) 14.3 (9) 16.7 (10) 9.5 (6) 0.6632
Hypertensive kidney disease, (n=249) 24.9 (62) 25.4 (16) 25.4 (16) 27.4 (17) 21.3 (13) 0.886 2 25.4 (16) 25.4 (16) 23.3 (14) 25.4 (16) 0.9912
Other, (n=249) 40.6 (101) 38.1 (24) 47.6 (30) 37.1 (23) 39.3 (24) 0.613 2 38.1 (24) 47.6 (30) 33.3 (20) 42.9 (27) 0.4082
Clinical variables
Dialysis vintage, mo, (n=251) 9.0 (5.0, 23.0) 18.0 (6.0, 34.0) 9.0 (4.0, 20.0) 9.0 (5.0, 20.0) 7.0 (3.4, 16.8) 0.004np 10.0 (4.0, 23.0) 11.0 (5.0, 32.0) 10.0 (5.0, 17.3) 7.0 (4.0, 24.0) 0.352np
Previous graft failure, (251) 18.7 (47) 24.2 (15) 11.1 (7) 19.0 (12) 20.6 (13) 0.287 2 22.2 (14) 17.5 (11) 21.0 (13) 14.3 (9) 0.6612
Accepted for renal transplantation, (n=252) 38.1 (96) 28.6 (18) 27.0 (17) 49.2 (31) 47.6 (30) 0.012 36.5 (23) 33.3 (21) 42.9 (27) 39.7 (25) 0.7182
Peritoneal dialysis, (n=252) 20.2 (51) 23.8 (15) 14.3 (9) 27.0 (17) 15.9 (10) 0.221 2 14.3 (9) 19.0 (12) 31.7 (20) 15.9 (10) 0.0622
Body mass index, kg/m2, (n=235) 24.9±4.9 23.6±5.0 25.5±4.8 24.9±4.6 25.5±5.0 0.135p 23.7±4.5 25.2±4.4 25.0±4.6 25.9±5.8 0.124p
Serum albumin, g/l, (n=246) 38.0±4.8 36.6±5.9 37.7±4.4 38.4±4.3 39.1±4.0 0.022p 38.7±3.9 37.8±4.4 38.1±5.5 37.4±5.2 0.503p
Hemoglobin, g/dl, (n=246) 12.1±1.5 12.0±1.4 12.1±1.5 12.2±1.5 12.2±1.4 0.87p 11.8±1.6 12.1±1.3 12.4±1.5 12.2±1.3 0.139p
Total cholesterol, mmol/L, (n=230) 4.2±1.1 4.0±1.2 4.1±1.1 4.5±1.1 4.2±1.1 0.103p 4.3±1.2 4.0±1.0 4.2±1.2 4.3±1.1 0.279p
Comorbidity
Diabetes, %, (n=250) 26.4 (66) 31.7 (20) 28.6 (18) 24.2 (15) 21.0 (13) 0.537 2 30.2 (19) 33.3 (21) 27.9 (17) 14.3 (9) 0.0772
CCI without age, (n=248) 4 (2, 5) 5 (4, 6) 4 (2, 4) 3 (2, 5) 3 (2, 4) <0.001np 4 (3, 5) 4 (3, 5) 4 (2, 5) 3 (2, 5) 0.436np
  1. CCI Charlson modified comorbidity index. Continuous variables are given as mean ± SD, when normally distributed, or as median (IQR), when skewed. P-values between the four groups are calculated based on parametric (ANOVA)p , nonparametric (Kruskall Wallis)np, or Chi-squared2 statistics. Note: Numbers of complete data are given in parentheses for each variable.