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Table 1 General characteristics of patients admitted to the ICU from 2011 to 2012 in 180 ICUs in Colombia

From: Effect of renal support therapy on 5-year survival in patients discharged from the intensive care unit

Baseline characteristics   Exposure status  
Full sample RRT No RRT Standardized differences P value
n = 150,230 n = 4,366 n = 145,864
Age mean (SD) 60.7 (19.2) 67 (15.6) 60.5 (12.3) 0.373 0.001
Age, n (%)
 18–50 39,821 (26.5) 587 (13.4) 39,234 (26.9) − 0.340 0.001
 51–60 22,677 (15.1) 567 (13) 22,110 (15.1) − 0.062 0.001
 61–70 29,727 (19.8) 964 (22.1) 28,763 (19.7) 0.058 0.001
 61–70 32,225 (21.5) 1273 (29.2) 30,952 (21.2) 0.184 0.001
 71–80 21,951 (14.6) 886 (20.3) 21,065 (14.4) 0.155 0.001
 81–90 3784 (2.5) 88 (2.0) 3696 (2.5) − 0.035 0.031
 91–100 45 (0.03) 1 (0.02) 44 (0.03) − 0.004 0.785
Region, n (%)
 Atlantic 19,354 (12.8) 720 (16.4) 18,634 (12.8) − 0.105  
 Bogota 45,615 (30.4) 1,072(24.6) 44,543 (30.5) − 0.134 0.001
 Central 34,241 (22.8) 1060 (24.3) 33,181 (22.8) 0.036 0.018
 Eastern 19,789 (13.2) 639 (14.6) 19,150 (13.1) 0.044 0.004
 Pacific 30,303 (20.1) 855 (19.6) 29,448 (20.2) − 0.015 0.326
 Other 928 (0.62) 20 (0.46) 908 (0.62) − 0.022 0.172
Female sex, n (%) 75,566 (51) 1786 (40,9) 74,789 (51.2) 0.209 0.001
Admission to ICU, n (%)
 Congestive heart failure 10,150 (6.8) 433 (9.9) 9717 (6.7) 0.118 0.001
 Trauma 6448 (4,3) 182 (4,2) 6266 (4.3) − 0.006 0.68
 Sepsis 12,854 (8.6) 941 (21.6) 11,913 (8.2) 0.383 0.001
Comorbidities, n (%)
 Myocardial infarction 11,983 (8) 276 (6.3) 11,707 (8) − 0.066 0.001
 Congestive heart failure 12,020 (8) 523 (11.9) 11,497 (7.9) 0.137 0.001
 Peripheral vascular disease 4977 (3.1) 183 (4.2) 4794 (3.4) 0.048 0.001
 Cerebrovascular disease 8043 (5.4) 281 (6.4) 7762 (5.3) 0.047 0.001
 Dementia 12,874 (8.6) 334 (7.7) 12,540 (8.6) − 0.035 0.028
 Chronic pulmonary disease 26,218 (17.5) 882 (20.2) 25,336 (17.4) 0.073 hg 0.001
 Connective tissue disease 5278 (3.5) 211 (4.8) 5067 (3.5) 0.068 0.001
 Peptic ulcer disease 17,101 (11.4) 555 (12.7) 16,546 (11.3) 0.042 0.05
 Mild liver disease 1290 (0.9) 68 (1.6) 1222 (0.84) 0.066 0.001
 Diabetes mellitus 28801 (19.2) 1463 (33.5) 27,338 (18.7) 0.341 0.001
 Metastasis solid tumor 4141 (2.7) 119 (2.7) 4022 (2.8) − 0.002 0.9
 AIDS 682 (0.5) 16 (0.4) 666 (0.5) − 0.014 0.38
 Any tumour 1004 (0.7) 38 (0.9) 966 (0.7) 0.024 0.09
 Hypertension 78,898 (52.2) 2904 (66.5) 75,994 (52.1) 0.297 0.001
Mortality, n (%)
 Discharge from ICU 12,391 (8.3) 1547 (35) 10,844 (7.4)   0.001
 1 year 28,243 (18.8) 2507 (57.4) 25,736 (17.6)   0.001
 5 year 46,809 (31.2) 2966 (67.9) 43,843 (30.1)   0.001
 ICU stay, mean (SD) 7.1(95) 9.9 (275) 7.0 (96)   0.001
 Follow-up time, years 4.5 (2.4) 2.3 (2.7) 4.6 (2.4)   0.001
  1. To calculate P values, the chi-squared test was used for categorical variables and Student’s t test for continuous variables