| |
Group |
X2 |
p-value |
| BMP (n=401) |
Control(n=366) |
| No. |
% |
No. |
% |
| Smoking status: |
|
|
|
|
|
|
| Non-smoker |
5 |
1.2 |
7 |
1.9 |
|
|
| Current smoker |
396 |
98.8 |
359 |
98.1 |
0.55 |
0.46 |
| Smoking years: |
|
|
|
|
|
|
| <5 |
15 |
3.8 |
27 |
7.5 |
|
|
| 5- |
77 |
19.4 |
125 |
34.8 |
|
|
| 10+ |
304 |
76.8 |
207 |
57.7 |
|
|
| Range |
2-45 |
1-41 |
|
|
| Mean±SD |
15.1 ± 7.7 |
12.4 ± 7.5 |
t=4.82 |
<0.001* |
(*) Statistically significant at p<0.05 |
