|
Variable
| |
Overall n = 66
|
100 mcg ITM n = 29
|
150 mcg ITM n = 37
|
P-values
|
|---|
|
Gender
|
Male
|
30 (45)
|
11 (37)
|
19 (63)
|
0.28
|
|
Female
|
36 (55)
|
18 (50)
|
18 (50)
|
|
Age in years
|
< 40
|
7 (11)
|
0 (0.0)
|
7 (100)
|
0.012
|
|
40–49
|
5 (8)
|
1 (20)
|
4 (80)
|
|
50–59
|
19 (29)
|
10 (53)
|
9 (47)
|
|
60–69
|
23 (31)
|
9 (39)
|
14 (61)
|
|
70+
|
12 (18)
|
9 (75)
|
3 (25)
|
|
Weight [median (IQR)]
| |
74.5 (65–80)
|
75 (65–79)
|
73 (65–80)
|
0.81
|
|
ASA
|
I
|
8 (12)
|
3 (38)
|
5 (62)
|
0.54
|
|
II
|
53 (80)
|
25 (47)
|
28 (53)
|
|
III
|
5 (7.58)
|
1 (20)
|
4 (80)
|
|
Surgery
|
THR
|
48 (73)
|
23 (48)
|
25 (52)
|
0.29
|
|
TKR
|
18 (27)
|
6 (33)
|
12 (67)
|
|
Bupivacaine
|
Median (IQR)
|
14 (13–14.5)
|
13 (12–14)
|
14 (14–15)
|
< 0.001
|
- ITM intrathecal morphine, THR total hip replacement, TKR total knee replacement, ASA American Society of Anaesthesiology
