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Table 2 Characteristics of SAPS II admission categories

From: Long-term survival and quality of life after intensive care for patients 80 years of age or older

  Planned surgery (n = 50) Unplanned surgery (n = 213) Medical reasons (n = 132) Total (n = 395) p value
Age, mean ± SD 83.5 ± 2.7 84.0 ± 2.7 83.5 ± 3.2 83.8 ± 2.9 0.217a
Male, % 64.0 60.6 60.6 61.0 0.889b
Length of stay (LOS), median (IQR)      
 ICU-LOS 2.0 (1.0–4.4) 2.2 (1.0–5.0) 1.2 (0.6–2.6) 1.8 (0.9–3.9) <0.001b
 Hospital LOS 15.1 (10.2–26.2) 12.9 (4.3–20.6) 6.5 (2.0–14.3) 11.3 (4.0–19.3) <0.001b
Ventilator support      
 Mechanical ventilator support, % (n) 48.0 (24) 69.5 (148) 53.0 (70) 61.3 (242) 0.001b
 Mechanical ventilator support time, median (IQR) 1.1 (0.4–3.7) 1.3 (0.5–3.8) 0.9 (0.3–2.0) 1.2 (0.5–3.3) 0.050b
 Non-invasive ventilator support, % (n) 44.0 (22) 33.8 (72) 28.0 (37) 29.6 (47) 0.119b
 Non-invasive ventilator support time, median (IQR) 1.2 (0.5–2.6) 2.0 (0.6–3.0) 1.0 (0.3–2.0) 1.3 (0.4–2.5) 0.056b
Severity score, mean ± SD      
 SAPS II 39.0 ± 13.2 (n = 47) 44.6 ± 14.8 (n = 212) 45.6 ± 15.6 (n = 131) 44.3 ± 15.0 (n = 390) 0.030a
 Max. SOFA 6.3 ± 4.1 (n = 47) 8.3 ± 3.6 (n = 212) 7.5 ± 3.8 (n = 130) 7.8 ± 3.8 (n = 389) 0.002a
Comorbidity      
 Charlson comorbidity index, mean ± SD 3.2 ± 1.8 (n = 50) 2.5 ± 2.0 (n = 209) 2.5 ± 1.7 (n = 131) 2.6 ± 1.9 (n = 390) 0.050a
 Charlson comorbidity index (CCI) categories, % (n)      
 None (CCI 0) 4.0 (2) 13.4 (28) 13.7 (18) 12.3 (48) 0.159b
 Mild (CCI 1–2) 34.0 (17) 43.1 (90) 39.7 (52) 40.8 (159) 0.436b
 Moderate (CCI 3–4) 46.0 (23) 26.3 (55) 36.6 (48) 32.3 (126) 0.009b
 Severe (CCI ≥5) 16.0 (8) 17.2 (36) 9.9 (13) 14.6 (57) 0.163b
Severe organ dysfunction, % (n)      
 Respiration 68.0 (34) 71.8 (153) 56.8 (75) 66.3 (262) 0.016b
 Circulation 38.0 (19) 53.1 (113) 40.9 (54) 47.1 (186) 0.035b
 Renal 30.0 (15) 28.6 (61) 26.5 (35) 28.1 (111) 0.868b
 CNS 20.0 (10) 23.5 (50) 32.6 (43) 26.1 (103) 0.100b
 Coagulation 16.0 (8) 8.5 (18) 9.8 (13) 9.9 (39) 0.273b
 Liver 2.0 (1) 0.0 (0) 3.0 (4) 1.3 (5) 0.034d
Survival, % (n)      
 ICU 90.0 (45) 74.2 (158) 73.5 (97) 75.9 (300) 0.045b
 Hospital 84.0 (42) 54.9 (117) 57.6 (76) 59.5 (235) 0.001b
 30 days 86.0 (43) 51.2 (109) 54.5 (72) 56.7 (224) <0.001b
 90 days 82.0 (41) 44.6 (95) 50.8 (67) 51.4 (203) <0.001b
 180 days 74.0 (37) 40.4 (86) 47.7 (63) 47.1 (186) <0.001b
 1 year 68.0 (34) 37.1 (79) 40.2 (53) 42.0 (166) <0.001b
 2 years 59.9 (28) 33.1 (64) 33.6 (39) 36.6 (130) 0.001b
 3 years 48.4 (15) 27.8 (50) 29.9 (32) 31.2 (96) 0.088b
 5 years 32.8 (7) 18.6 (28) 23.7 (22) 22.2 (55) 0.290b
Diagnostic groups, % (n)      
 Respiratory failure 44.0 (22) 24.4 (52) 28.0 (37) 28.1 (111) 0.021b
 Circulatory failure 8.0 (4) 8.5 (18) 7.6 (10) 8.1 (32) 0.959b
 Combined respiratory and circulatory failure 8.0 (4) 12.7 (27) 7.6 (10) 10.4 (41) 0.270b
 Neurologic failure 2.0 (1) 7.0 (15) 18.2 (24) 10.1 (40) <0.001b
 Isolated head injury 0.0 (0) 1.9 (4) 4.5 (6) 2.5 (10) 0.165d
 Sepsis 4.0 (2) 8.9 (19) 10.6 (14) 8.9 (35) 0.308d
 Gastroenterological failure 0 (0) 5.6 (12) 5.3 (7) 4.8 (19) 0.276d
 Multiple organ failure 4.0 (2) 7.5 (16) 3.0 (4) 5.6 (22) 0.205d
 Multitrauma without head injury 0.0 (0) 5.6 (12) 2.3 (3) 3.8 (15) 0.107d
 Multitrauma with head injury 0.0 (0) 2.3 (5) 3.0 (4) 2.3 (9) 0.638d
 Planned surgery 18.0 (9) 1.4 (3) 0.8 (1) 3.3 (13) <0.001d
 Acute operation 2.0 (1) 10.3 (22) 2.3 (3) 6.6 (26) 0.004d
 Unspecified 10.0 (5) 3.8 (8) 6.8 (9) 5.6 (22) 0.150d
 SMR (95 % CI) 0.55 (0.28–1.11) (n = 47) 1.15 (0.94–1.40) (n = 212) 1.05 (0.81–1.37) (n = 131) 1.06 (0.90–1.23) (n = 390)  
  1. Survival times were derived from the life table method
  2. IQR interquartile range, SD standard deviation, CI confidence interval, ICU intensive care unit, SAPS II simplified acute physiology score II, SOFA sequential organ failure assessment, CCI Charlson comorbidity index, SMR standardized mortality ratio
  3. aWith ANOVA (analysis of variance)
  4. bPearson’s chi-square test
  5. cWith Kruskal-Wallis test
  6. dFisher’s exact test