Table 1. Characteristics of 77 subjects in 2004.
| Toner–handling group | Non–toner–handling group | Statistics | p value | ||||
|---|---|---|---|---|---|---|---|
| No. of subjects | 32 | 45 | |||||
| Sex | |||||||
| Male, n / (%) | 28 | (87.5) | 37 | (82.2) | 0.396a | 0.529 | |
| Female, n / (%) | 4 | (12.5) | 8 | (17.8) | |||
| Age, Mean / (SD) | 38.6 | (6.3) | 38.2 | (7.0) | 0.273b | 0.786 | |
| Age group (years), n / (%) | |||||||
| 20–29 | 1 | (3.1) | 4 | (8.9) | |||
| 30–39 | 15 | (46.9) | 21 | (46.7) | |||
| 40–49 | 15 | (46.9) | 20 | (44.4) | |||
| 50–59 | 1 | (3.1) | |||||
| BMI, Mean / (SD) | 23.2 | (4.1) | 22.1 | (2.4) | 1.418b | 0.160 | |
| Smoking | |||||||
| Never smoker, n / (%) | 9 | (28.1) | 16 | (35.6) | 0.677a | 0.879 | |
| Former smoker 1c, n / (%) | 3 | (9.4) | 5 | (11.1) | |||
| Former smoker 2d, n / (%) | 8 | (25.0) | 9 | (20.0) | |||
| Current smoker, n / (%) | 12 | (37.5) | 15 | (33.3) | |||
| PI of respiratory system | |||||||
| bronchiectasis | 1 | ||||||
| chronic bronchitis | 1 | ||||||
| other respiratory diseases | 2 | ||||||
| PMH of respiratory system | |||||||
| pneumonia, bronchitis | 7 | 4 | |||||
| pleuritis | 1 | ||||||
| pulmonary tuberculosis | 1 | ||||||
| other respiratory diseases | 1 | ||||||
BMI: body mass index, SD: standard deviation, PI: present illness, PMH: past medical history
a Statistics were χ2 values. b Statistics were t values. c Former smoker 1 were subjects who had ceased smoking before 2003.
d Former smoker 2 were subjects who had ceased smoking during the years of the survey.