Clinical Evaluation of a Novel Technology for Oral Patient-Controlled Analgesia, the PCoA® Acute Device, for Hospitalized Patients with Postoperative Pain, in Pilot Feasibility Study
Table 3
Analysis of pill intake time (minutes) by group and by medical center. Analysis was done by nonparametric Wilcoxon-Mann–Whitney method. Analysis of variance (ANOVA) was applied for analyzing the difference in the study outcomes between study centers within study groups (MC: Medical Center).
Parameter
All centers
MC-A
MC-B
MC-C
Group
Control
Test
Control
Test
Control
Test
Control
Test
Number of total pills
75
135
21
55
17
49
37
31
Number of patients
43
27
20
9
12
9
11
9
Parameter (minutes)
Mean
8.58
1.17
8.61
0.89
8.38
1.25
8.64
1.55
Std
8.04
0.55
5.92
0.40
13.66
0.43
5.50
0.68
StdErr
0.93
0.05
1.29
0.05
3.31
0.06
0.90
0.12
Min
2.00
0.38
2.42
0.38
2.00
0.74
2.52
1.03
Median
6.33
1.05
7.08
0.86
4.37
1.29
6.75
1.33
Max
60.00
3.77
28.80
1.65
60.00
2.62
28.10
3.77
value (Wilcoxon test)
value for difference between the centers by group (ANOVA)
