Table 1 Sample characteristics.
Variable | Large-number frame | Small-number frame | |||
|---|---|---|---|---|---|
Frequency | Percent | Frequency | Percent | ||
Gender | Male | 68 | 44.4 | 68 | 45.6 |
Female | 85 | 55.6 | 81 | 54.4 | |
Age | 18–29 years | 75 | 49.0 | 69 | 46.3 |
30–39 years | 54 | 35.3 | 54 | 36.2 | |
40–49 years | 16 | 10.5 | 17 | 11.4 | |
50–59 years | 8 | 5.2 | 9 | 6.0 | |
60 years and older | 0 | 0 | 0 | 0 | |
Education level | High school and less | 19 | 12.4 | 9 | 6.0 |
Vocational training | 27 | 17.6 | 28 | 18.8 | |
Undergraduate | 92 | 60.1 | 103 | 69.1 | |
Master | 14 | 9.2 | 7 | 4.7 | |
Doctor | 1 | 0.7 | 2 | 1.3 | |
Monthly income | ￥3000 and less | 30 | 19.6 | 21 | 14.1 |
￥3001–￥5000 | 34 | 22.2 | 43 | 28.9 | |
￥5001–￥8000 | 50 | 32.7 | 38 | 25.5 | |
￥8001–￥15,000 | 33 | 21.6 | 40 | 26.8 | |
￥15,001 and more | 6 | 3.9 | 7 | 4.7 | |
Reasonable product lifespan | 0–3 years | 9 | 5.9 | 5 | 3.4 |
4–6 years | 63 | 41.2 | 48 | 32.2 | |
7–10 years | 63 | 41.2 | 74 | 49.7 | |
11–14 years | 15 | 9.8 | 15 | 10.1 | |
15 years and more | 3 | 2.0 | 7 | 4.7 | |
Washing Frequency | 1 day | 27 | 17.6 | 25 | 16.8 |
2–3 days | 77 | 50.3 | 88 | 59.1 | |
1 week | 42 | 27.5 | 34 | 22.8 | |
2–3 weeks | 5 | 3.3 | 2 | 1.3 | |
1 month and longer | 2 | 1.3 | 0 | 0 | |
Total | 153 | 100 | 149 | 100 | |
