Table 3

Comparison of postoperative factors of oldest against youngest and medium age patients

Postoperative factorsAge groupsYoungest versus mediumYoungest versus oldestMedium versus oldest
Youngest
Age 17–64
n=2514
Medium
Age 65–79
n=3795
Oldest
Age 80+
n=4892
Univariable OR
(95% CI)
p Value
Multivariable OR
(95% CI)
p Value
Univariable OR
(95% CI)
p Value
Multivariable OR
(95% CI)
p Value
Univariable OR
(95% CI)
p Value
Multivariable OR
(95% CI)
p Value
Fluid balance problems (%)136/2308 (5.9%)325/3543 (9.2%)548/4654 (11.8%)1.61 (1.31 to 1.98)
<0.001*
1.53 (1.18 to 1.98)
0.001*
2.13 (1.75 to 2.59)
<0.001*
1.71 (1.34 to 2.19)
<0.001*
1.32 (1.14 to 1.53)
<0.001*
1.12 (0.94 to 1.33)
0.218
Unplanned return to theatre (%)439/2331 (18.8%)726/3586 (20.2%)526/4709 (11.2%)1.09 (0.96 to 1.25)
0.182
1.12 (0.94 to 1.33)
0.188
0.54 (0.47 to 0.62)
<0.001*
0.56 (0.47 to 0.69)
<0.001*
0.50 (0.44 to 0.56)
<0.001*
0.50 (0.43 to 0.58)
<0.001*
Unplanned ICU admission (%)329/1618 (20.3%)601/2504 (24.0%)545/3350 (16.3%)1.24 (1.06 to 1.44)
0.006*
1.02 (0.86 to 1.21)
0.830
0.76 (0.65 to 0.89)
<0.001*
0.67 (0.57 to 0.80)
<0.001*
0.62 (0.54 to 0.70)
<0.001*
0.66 (0.57 to 0.76)
<0.001*
Treated in ICU (%)1973/2410 (81.9%)2754/3590 (76.7%)2689/4507 (59.7%)0.73 (0.64 to 0.83)
<0.001*
0.73 (0.61 to 0.88)
0.001*
0.33 (0.29 to 0.37)
<0.001*
0.30 (0.25 to 0.36)
<0.001*
0.45 (0.41 to 0.50)
<0.001*
0.41 (0.36 to 0.47)
<0.001*
Different action by surgeon (%)295/1586 (18.6%)518/2466 (21.0%)490/3295 (14.9%)1.16 (0.99 to 1.36)
0.062
1.04 (0.88 to 1.24)
0.586
0.76 (0.65 to 0.90)
0.001*
0.74 (0.62 to 0.88)
<0.001*
0.66 (0.57 to 0.75)
<0.001*
0.71 (0.61 to 0.82)
<0.001*
Clinical incidents (%)446/1719 (26.0%)729/2594 (28.1%)745/3436 (21.7%)1.12 (0.97 to 1.28)
0.119
1.04 (0.89 to 1.21)
0.603
0.79 (0.69 to 0.90)
0.001*
0.76 (0.66 to 0.89)
<0.001*
0.71 (0.63 to 0.80)
<0.001*
0.74 (0.65 to 0.84)
<0.001*
Postoperative complication (%)737/2433 (30.3%)1504/3711 (40.5%)1621/4824 (33.6%)1.57 (1.41 to 1.75)
<0.001*
1.45 (1.25 to 1.68)
<0.001*
1.16 (1.05 to 1.29)
0.004*
1.16 (1.01 to 1.34)
0.037*
0.74 (0.68 to 0.81)
<0.001*
0.80 (0.71 to 0.90)
<0.001*
Infection present at death† (%)155/474 (32.6%)251/699 (35.9%)347/935 (37.1%)1.15 (0.90 to 1.48)
0.257
1.08 (0.82 to 1.40)
0.578
1.21 (0.96 to 1.53)
0.103
1.13 (0.88 to 1.45)
0.346
1.05 (0.86 to 1.29)
0.617
1.05 (0.85 to 1.30)
0.666
  • Reference group: the youngest age group is always the point of comparison (youngest vs medium; youngest vs oldest and medium vs oldest).

  • *Statistically significant (p<0.05).

  • †New question in data collection tool (denominators are lower).

  • ICU, intensive care unit.