|
Anaesthesia
|
LOS (Days)
|
|---|
|
N
|
β
|
95%CI
|
Interaction P-value
|
|---|
|
Age (years) group
| | | |
0.0072
|
|
< 60
|
472
|
0.45
|
(− 0.03, 0.92)
| |
|
> =60, < 70
|
1011
|
0.56
|
(− 0.07, 1.20)
| |
|
> =70, < 80
|
744
|
1.99
|
(1.15, 2.83)
| |
|
> =80
|
139
|
2.46
|
(−0.29, 5.20)
| |
|
Sex
| | | |
0.0588
|
|
Female
|
1794
|
0.62
|
(0.19, 1.05)
| |
|
Male
|
572
|
1.58
|
(0.49, 2.67)
| |
|
Ethnicity
| | | |
0.8872
|
|
Chinese
|
1987
|
0.86
|
(0.38, 1.34)
| |
|
Malay
|
169
|
0.78
|
(−0.04, 1.60)
| |
|
Indian
|
137
|
0.40
|
(− 0.53, 1.32)
| |
|
Others
|
73
|
1.53
|
(−0.46, 3.52)
| |
|
BMI group
| | | |
0.0067
|
|
< 25
|
726
|
1.87
|
(1.06, 2.67)
| |
|
> =25, < 30
|
963
|
0.28
|
(−0.36, 0.93)
| |
|
> =30, < 35
|
467
|
0.38
|
(−0.26, 1.01)
| |
|
> =35
|
153
|
0.96
|
(−0.17, 2.09)
| |
|
ASA Status
| | | |
0.5077
|
|
1
|
161
|
−0.01
|
(− 0.74, 0.73)
| |
|
2
|
2058
|
0.84
|
(0.46, 1.21)
| |
|
3
|
147
|
1.16
|
(0.46, 1.21)
| |
|
Hb(g/dL) group
| | | |
0.9170
|
|
< 11
|
164
|
1.08
|
(−1.04, 3.19)
| |
|
> =11, < 13
|
888
|
0.92
|
(0.17, 1.67)
| |
|
> =13
|
1314
|
0.79
|
(0.32, 1.26)
| |
|
duration of surgery (mins) group
| | | |
0.5324
|
|
< 60
|
320
|
1.00
|
(0.28, 1.72)
| |
|
> =60, < 120
|
1903
|
0.72
|
(0.25, 1.18)
| |
|
> =120
|
143
|
1.63
|
(−0.77, 4.03)
| |
|
Smoking
| | | |
0.1232
|
|
No
|
2141
|
0.93
|
(0.48, 1.37)
| |
|
Yes
|
225
|
−0.23
|
(−1.13, 0.68)
| |
|
OSA
| | | |
0.5106
|
|
No
|
2152
|
0.88
|
(0.43, 1.32)
| |
|
Yes
|
214
|
0.39
|
(−0.40, 1.18)
| |
|
DM
| | | |
0.2677
|
|
No
|
1920
|
0.72
|
(0.30, 1.15)
| |
|
Yes
|
446
|
1.32
|
(0.12, 2.51)
| |
|
IHD
| | | |
0.0002
|
|
No
|
2239
|
0.65
|
(0.25, 1.05)
| |
|
Yes
|
127
|
4.05
|
(1.07, 7.02)
| |
|
CCF
| | | |
0.0423
|
|
No
|
2348
|
0.91
|
(0.52, 1.29)
| |
|
Yes
|
18
|
−5.88
|
(−36.03, 24.28)
| |
|
CVA
| | | |
0.3150
|
|
No
|
2321
|
0.81
|
(0.39, 1.23)
| |
|
Yes
|
45
|
2.34
|
(0.34, 4.33)
| |
|
Creatinine > 2 mg/dl
| | | |
< 0.0001
|
|
No
|
2090
|
1.06
|
(0.64, 1.47)
| |
|
Not recorded
|
258
|
−0.43
|
(−1.55, 0.68)
| |
|
Yes
|
18
|
−7.68
|
(−26.62, 11.27)
| |
|
DM on insulin
| | | |
0.1413
|
|
No
|
1764
|
1.07
|
(0.57, 1.57)
| |
|
Not recorded
|
563
|
0.09
|
(−0.62, 0.79)
| |
|
Yes
|
39
|
1.04
|
(−1.10, 3.17)
| |
|
Day of week of operation
| | | |
0.1282
|
|
Monday
|
390
|
1.08
|
(−0.34, 2.49)
| |
|
Tuesday
|
539
|
0.37
|
(−0.29, 1.04)
| |
|
Wednesday
|
405
|
0.40
|
(−0.28, 1.08)
| |
|
Thursday
|
533
|
0.60
|
(0.01, 1.18)
| |
|
Friday
|
378
|
2.08
|
(0.60, 3.57)
| |
|
Saturday
|
121
|
0.15
|
(−0.69, 0.99)
| |
- Abbreviations: LOS Length of stay, ASA American Society of Anesthesiologist Physical Status, OSA Obstructive sleep apnea, DM Diabetes mellitus, IHD Ischaemic heart disease, CCF Congestive cardiac failure, CVA Cerebrovascular accidents
