Table 2. Distribution of cigarette smoking habit among control, asthma, CB, and COPD subjects.
|
Cigarette smoking habit |
Control (n=109) |
Asthma alone (n=99) |
CB (n=100) |
COPD (n=98) |
P-value |
|
Never (BI1=0) (n=204) Current (15≤BI≤1000) (n=202) |
72(66.1%) 37(33.9%) |
58(58.6%) 41(41.4%) |
42(42%) 58(58%) |
32(32.7%) 66(67.3%) |
0.00 |
|
BI category among current smokers BI<400 (n=136) BI≥400 (n=66) |
34(91.8%) 03 (8.2%) |
30 (73.1%) 11 (26.9%) |
35 (60.3%) 23 (39.7%) |
37 (56.1%) 29 (43.9%) |
0.00 |
1 BI is the number of cigarettes smoked per day multiplied by the number of years of smoking. It is normally used to evaluate the cumulative dose of smoking.