|
Age (years) group
|
|
< 60
|
472 (19.95%)
|
Reference
|
|
> =60, < 70
|
1011 (42.73%)
|
0.30 (− 0.22, 0.83) 0.2604
|
|
> =70, < 80
|
744 (31.45%)
|
1.14 (0.58, 1.70) < 0.0001
|
|
> =80
|
139 (5.87%)
|
2.43 (1.52, 3.35) < 0.0001
|
|
Sex
|
|
Female
|
1794 (75.82%)
|
Reference
|
|
Male
|
572 (24.18%)
|
−0.14 (− 0.60, 0.32) 0.5539
|
|
Ethnicity
|
|
Chinese
|
1987 (83.98%)
|
Reference
|
|
Malay
|
169 (7.14%)
|
−0.48 (−1.24, 0.28) 0.2185
|
|
Indian
|
137 (5.79%)
|
0.00 (− 0.84, 0.84) 0.9975
|
|
Others
|
73 (3.09%)
|
0.63 (−0.51, 1.77) 0.2790
|
|
BMI group
|
|
< 25
|
726 (31.44%)
|
Reference
|
|
> =25, < 30
|
963 (41.71%)
|
−0.28 (−0.73, 0.16) 0.2159
|
|
> =30, < 35
|
467 (20.23%)
|
−0.38 (− 0.92, 0.16) 0.1692
|
|
> =35
|
153 (6.63%)
|
0.30 (−0.51, 1.11) 0.4650
|
|
ASA Status
|
|
1
|
161 (6.80%)
|
Reference
|
|
2
|
2058 (86.98%)
|
0.45 (− 0.32, 1.22) 0.2526
|
|
3
|
147 (6.21%)
|
3.98 (2.91, 5.05) < 0.0001
|
|
Hb(g/dL) group
|
|
> =13
|
1314 (55.54%)
|
Reference
|
|
> =11, < 13
|
888 (37.53%)
|
0.66 (0.25, 1.07) 0.0018
|
|
< 11
|
164 (6.93%)
|
2.09 (1.31, 2.88) < 0.0001
|
|
Duration of surgery (mins) group
|
|
< 60
|
320 (13.52%)
|
Reference
|
|
> =60, < 120
|
1903 (80.43%)
|
0.26 (−0.31, 0.84) 0.3678
|
|
> =120
|
143 (6.04%)
|
1.74 (0.78, 2.69) 0.0004
|
|
Smoking
|
225 (9.51%)
|
−0.49 (−1.16, 0.18) 0.1525
|
|
OSA
|
214 (9.04%)
|
−0.62 (− 1.30, 0.07) 0.0765
|
|
DM
|
446 (18.85%)
|
0.94 (0.44, 1.44) 0.0002
|
|
IHD
|
127 (5.37%)
|
1.71 (0.85, 2.58) 0.0001
|
|
CCF
|
18 (0.76%)
|
5.90 (3.65, 8.14) < 0.0001
|
|
CVA
|
45 (1.90%)
|
1.21 (−0.23, 2.64) 0.0993
|
|
Creatinine > 2 mg/dl
|
18 (0.76%)
|
6.53 (4.28, 8.77) < 0.0001
|
|
DM on insulin
|
39 (1.65%)
|
0.30 (−1.25, 1.84) 0.7078
|
|
Day of week of operation
|
|
Monday
|
390 (16.48%)
|
Reference
|
|
Tuesday
|
539 (22.78%)
|
−0.31 (− 0.94, 0.32) 0.3404
|
|
Wednesday
|
405 (17.12%)
|
−0.62 (−1.30, 0.05) 0.0691
|
|
Thursday
|
533 (22.53%)
|
−1.29 (− 1.92, − 0.66) < 0.0001
|
|
Friday
|
378 (15.98%)
|
0.27 (−0.41, 0.96) 0.4340
|
|
Saturday
|
121 (5.11%)
|
−1.31 (−2.30, −0.32) 0.0095
|
