Table 3.
EQ-VAS scores (0–100 scale) according to sample in different strata and comparisons of scores between modes of survey using linear regression analysis
| n | Postal survey | n | Web survey | P | ||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Bivariate | Multivariable | |||
| Overall | 1131 | 79.5 | (18.8) | 977 | 77.9 | (19.5) | 0.061 | 0.487A,S,E |
| Sex | ||||||||
| Male | 556 | 79.3 | (18.1) | 468 | 77.6 | (19.1) | 0.152 | 0.626A,E |
| Female | 575 | 79.7 | (19.5) | 509 | 78.2 | (20.0) | 0.217 | 0.679A,E |
| Age group, years | ||||||||
| 19–30 | 147 | 86.1 | (12.0) | 108 | 83.6 | (12.4) | 0.105 | 0.106S,E |
| 31–40 | 169 | 83.3 | (15.9) | 145 | 81.2 | (17.7) | 0.270 | 0.709S,E |
| 41–50 | 213 | 83.1 | (14.7) | 199 | 77.8 | (20.4) | 0.003 | 0.011S,E |
| 51–60 | 227 | 80.1 | (17.3) | 216 | 76.1 | (21.0) | 0.028 | 0.516S,E |
| 61–70 | 200 | 76.9 | (19.1) | 252 | 76.3 | (20.0) | 0.713 | 0.476S,E |
| ≥ 71 | 175 | 68.0 | (25.6) | 57 | 73.5 | (21.3) | 0.146 | 0.149S,E |
| Education, years | ||||||||
| Basic education (≤10) | 121 | 69.1 | (23.4) | 319 | 74.6 | (22.8) | 0.023 | 0.360A,S |
| Secondary education (11–13) | 493 | 77.9 | (19.1) | 409 | 78.3 | (17.7) | 0.747 | 0.740A,S |
| Higher education (≥14) | 476 | 84.5 | (13.7) | 249 | 81.4 | (17.1) | 0.009 | 0.006A,S |
A,S,EControlling for Age (A), Sex (S), and Education (E) in multivariable linear regression