Table 1: The frequency distribution of some demographic variables in the three groups
| Variable |
Group |
Chi-square test |
| Ice |
Placebo |
Control |
Total |
|
n |
% |
n |
% |
n |
% |
n |
% |
| Gender |
Female |
9 |
26.5 |
12 |
35.3 |
9 |
26.5 |
30 |
29.4 |
p=0.654 |
| Male |
25 |
73.5 |
22 |
64.7 |
25 |
73.5 |
72 |
72.6 |
| Education |
Illiterate |
27 |
79.4 |
29 |
85.3 |
28 |
82.4 |
84 |
82.4 |
Fisher exact p=0.823 |
| Under Diploma |
1 |
2.9 |
3 |
8.8 |
2 |
5.9 |
6 |
5.9 |
| Diploma |
4 |
11.8 |
1 |
2.9 |
3 |
8.8 |
8 |
7.8 |
| University |
2 |
5.9 |
1 |
2.9 |
1 |
2.9 |
4 |
3.9 |
| Pain tolerance |
Very high |
7 |
20 |
3 |
8.8 |
6 |
17.6 |
16 |
15.7 |
Fisher exact p=0.355 |
| high |
20 |
58.8 |
17 |
50 |
15 |
44.1 |
52 |
51 |
| Moderate |
3 |
8.8 |
9 |
26.5 |
10 |
29.4 |
22 |
21.6 |
| low |
3 |
8.8 |
2 |
5.9 |
1 |
2.9 |
6 |
5.9 |
| Very low |
1 |
2.9 |
3 |
8.8 |
2 |
5.9 |
6 |
5.9 |
| Worst pain |
Angina |
16 |
47.1 |
21 |
61.8 |
23 |
67.6 |
60 |
58.8 |
p=0.206 |
| Others |
18 |
52.9 |
13 |
38.2 |
11 |
32.4 |
42 |
41.2 |
| Smoking |
No |
28 |
82.4 |
30 |
88.2 |
30 |
88.2 |
88 |
86.3 |
Fisher exact p=0.819 |
| Yes |
6 |
17.6 |
4 |
11.8 |
4 |
11.8 |
14 |
13.7 |
| Drug abuse |
No |
28 |
82.4 |
27 |
79.4 |
29 |
85.3 |
84 |
82.4 |
p=0.946 |
| Yes |
6 |
17.6 |
7 |
20.6 |
5 |
14.7 |
18 |
17.6 |
| Type of drain |
Thoracic |
16 |
47.1 |
19 |
55.9 |
16 |
47.1 |
51 |
50 |
p=0.703 |
| Mediastinal |
18 |
52.9 |
15 |
44.1 |
18 |
52.9 |
51 |
50 |