2011 survey Reference [11] | 2014 survey | |
---|---|---|
Survey methods | ||
No. of questionnaire items | 18 questions | 20 questions (2 questions were added) |
Data collection method | Online | Online |
Sample size | 1000 | 1000 |
Demographics | ||
Gender | ||
Male | 499 | 498 |
Female | 501 | 502 |
Age (yr) | ||
20–29 | 207 | 190 |
30–39 | 237 | 222 |
40–49 | 231 | 236 |
50–59 | 206 | 221 |
60–69 | 119 | 131 |
Region of residence | ||
Seoul | 541 | 538 |
Daejeon | 79 | 77 |
Daegu | 125 | 128 |
Busan | 182 | 186 |
Gwangju | 73 | 71 |