Table 5.
Results of the graded response model analysis of the Chinese-language version of the Warwick-Edinburgh Mental Well-being Scale.
| Item | Coefficient | 95% CI | SE | z | P>z | ||||||||
| 1 | |||||||||||||
|
|
Discrimination difference | 2.526 | 2.200-2.853 | 0.167 | 15.160 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.394 | 1.578-1.210 | 0.094 | 14.84 | <.001 | ||||||
|
|
|
≥3 | 0.081 | 0.039-0.201 | 0.061 | 1.32 | .19 | ||||||
|
|
|
≥4 | 0.806 | 0.669-0.943 | 0.070 | 11.54 | <.001 | ||||||
|
|
|
5 | 1.455 | 1.270-1.640 | 0.094 | 15.42 | <.001 | ||||||
| 2 | |||||||||||||
|
|
Discrimination difference | 3.010 | 2.621-3.400 | 0.199 | 15.140 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.064 | 1.212-0.916 | 0.075 | 14.09 | <.001 | ||||||
|
|
|
≥3 | 0.232 | 0.117-0.348 | 0.059 | 3.94 | <.001 | ||||||
|
|
|
≥4 | 1.058 | 0.914-1.203 | 0.074 | 14.38 | <.001 | ||||||
|
|
|
5 | 1.656 | 1.463-1.850 | 0.099 | 16.78 | <.001 | ||||||
| 3 | |||||||||||||
|
|
Discrimination difference | 3.024 | 2.641-3.407 | 0.195 | 15.490 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.619 | 1.814-1.424 | 0.100 | 16.25 | <.001 | ||||||
|
|
|
≥3 | 0.119 | 0.233-0.004 | 0.058 | 2.03 | .04 | ||||||
|
|
|
≥4 | 0.559 | 0.439-0.679 | 0.061 | 9.13 | <.001 | ||||||
|
|
|
5 | 1.208 | 1.053-1.364 | 0.079 | 15.22 | <.001 | ||||||
| 4 | |||||||||||||
|
|
Discrimination difference | 2.026 | 1.756-2.297 | 0.138 | 14.670 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.422 | 1.625-1.219 | 0.103 | 13.74 | <.001 | ||||||
|
|
|
≥3 | 0.115 | 0.245-0.016 | 0.067 | 1.72 | .09 | ||||||
|
|
|
≥4 | 0.643 | 0.501-0.785 | 0.073 | 8.87 | <.001 | ||||||
|
|
|
5 | 1.405 | 1.207-1.602 | 0.101 | 13.19 | <.001 | ||||||
| 5 | |||||||||||||
|
|
Discrimination difference | 3.495 | 3.051-3.939 | 0.227 | 15.420 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.726 | 1.928-1.525 | 0.103 | 16.79 | <.001 | ||||||
|
|
|
≥3 | 0.220 | 0.331-0.109 | 0.057 | 3.88 | <.001 | ||||||
|
|
|
≥4 | 0.469 | 0.356-0.583 | 0.058 | 8.10 | <.001 | ||||||
|
|
|
5 | 1.117 | 0.974-1.261 | 0.073 | 15.26 | <.001 | ||||||
| 6 | |||||||||||||
|
|
Discrimination difference | 4.110 | 3.573-4.646 | 0.274 | 15.020 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.480 | 1.650-1.310 | 0.087 | 17.06 | <.001 | ||||||
|
|
|
≥3 | 0.001 | 0.108-0.106 | 0.055 | 0.01 | .99 | ||||||
|
|
|
≥4 | 0.873 | 0.748-0.997 | 0.063 | 13.79 | <.001 | ||||||
|
|
|
5 | 1.459 | 1.296-1.623 | 0.084 | 17.45 | <.001 | ||||||
| 7 | |||||||||||||
|
|
Discrimination difference | 4.258 | 3.680-4.835 | 0.295 | 14.450 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.422 | 1.586-1.258 | 0.084 | 17.02 | <.001 | ||||||
|
|
|
≥3 | 0.149 | 0.042-0.255 | 0.054 | 2.74 | .006 | ||||||
|
|
|
≥4 | 0.887 | 0.762-1.011 | 0.063 | 13.99 | <.001 | ||||||
|
|
|
5 | 1.532 | 1.364-1.701 | 0.086 | 17.82 | <.001 | ||||||
| 8 | |||||||||||||
|
|
Discrimination difference | 5.098 | 4.400-5.796 | 0.356 | 14.310 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.459 | 1.622-1.297 | 0.083 | 17.58 | <.001 | ||||||
|
|
|
≥3 | 0.060 | 0.164-0.043 | 0.053 | 1.14 | .25 | ||||||
|
|
|
≥4 | 0.682 | 0.571-0.793 | 0.057 | 12.00 | <.001 | ||||||
|
|
|
5 | 1.235 | 1.094-1.375 | 0.072 | 17.25 | <.001 | ||||||
| 9 | |||||||||||||
|
|
Discrimination difference | 3.571 | 3.111-4.032 | 0.235 | 15.200 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.334 | 1.496-1.173 | 0.083 | 16.17 | <.001 | ||||||
|
|
|
≥3 | 0.113 | 0.004-0.223 | 0.056 | 2.02 | .04 | ||||||
|
|
|
≥4 | 0.967 | 0.833-1.100 | 0.068 | 14.19 | <.001 | ||||||
|
|
|
5 | 1.638 | 1.455-1.822 | 0.094 | 17.47 | <.001 | ||||||
| 10 | |||||||||||||
|
|
Discrimination difference | 3.942 | 3.439-4.446 | 0.257 | 15.360 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.498 | 1.672-1.323 | 0.089 | 16.18 | <.001 | ||||||
|
|
|
≥3 | 0.117 | 0.224-0.009 | 0.055 | 2.12 | .03 | ||||||
|
|
|
≥4 | 0.655 | 0.539-0.771 | 0.059 | 11.05 | <.001 | ||||||
|
|
|
5 | 1.320 | 1.167-1.473 | 0.078 | 16.91 | <.001 | ||||||
| 11 | |||||||||||||
|
|
Discrimination difference | 3.171 | 2.762-3.580 | 0.209 | 15.200 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.374 | 1.544-1.204 | 0.087 | 15.85 | <.001 | ||||||
|
|
|
≥3 | 0.134 | 0.021-0.247 | 0.058 | 2.33 | .02 | ||||||
|
|
|
≥4 | 1.011 | 0.872-1.151 | 0.071 | 14.17 | <.001 | ||||||
|
|
|
5 | 1.597 | 1.411-1.783 | 0.095 | 16.79 | <.001 | ||||||
| 12 | |||||||||||||
|
|
Discrimination difference | 2.962 | 2.583-3.341 | 0.193 | 15.320 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.373 | 1.545-1.200 | 0.088 | 15.59 | <.001 | ||||||
|
|
|
≥3 | 0.118 | 0.003-0.234 | 0.059 | 2.01 | .04 | ||||||
|
|
|
≥4 | 0.917 | 0.781-1.053 | 0.069 | 13.20 | <.001 | ||||||
|
|
|
5 | 1.639 | 1.445-1.833 | 0.099 | 16.56 | <.001 | ||||||
| 13 | |||||||||||||
|
|
Discrimination difference | 2.539 | 2.215-2.864 | 0.166 | 15.330 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.427 | 1.613-1.241 | 0.095 | 15.02 | <.001 | ||||||
|
|
|
≥3 | 0.042 | 0.078-0.162 | 0.061 | 0.69 | .49 | ||||||
|
|
|
≥4 | 0.713 | 0.579-0.846 | 0.068 | 10.48 | <.001 | ||||||
|
|
|
5 | 1.554 | 1.361-1.747 | 0.099 | 15.77 | <.001 | ||||||
| 14 | |||||||||||||
|
|
Discrimination difference | 3.925 | 3.411-4.440 | 0.262 | 14.960 | <.001 | |||||||
|
|
Item difficulty | ||||||||||||
|
|
|
≥2 | 1.493 | 1.666-1.320 | 0.088 | 16.92 | <.001 | ||||||
|
|
|
≥3 | 0.066 | 0.041-0.174 | 0.055 | 1.21 | .23 | ||||||
|
|
|
≥4 | 0.785 | 0.663-0.907 | 0.062 | 12.64 | <.001 | ||||||
|
|
|
5 | 1.451 | 1.287-1.614 | 0.083 | 17.38 | <.001 | ||||||