Table 1 Descriptions of the Variables
From: Income gradient in health-related quality of life — the role of social networking time
Variables | Obs | Mean/percent | SD | Value | Value label |
|---|---|---|---|---|---|
Dependent variables | |||||
Days of poor physical health | 3322 | 2.581 | 6.188 | 0–30 | |
Days of poor mental health | 3330 | 3.297 | 6.964 | 0–30 | |
Days of activity limitation | 3325 | 1.230 | 4.062 | 0–30 | |
Assessment of general health | 3329 | 3.652 | 1.015 | 1–5 | 1 = poor, 5 = excellent |
Independent variable | |||||
Income ($) | 3042 | 38,281.08 | 33,832.01 | 236.5–144,502.7 | |
Mediator | |||||
Social networking time | 3330 | 54.972 | 91.971 | 0–300 | |
Control variables | |||||
Age | 3320 | 42.898 | 13.308 | 18–88 | |
Sex (male) | 3330 | 48.02% | – | 0,1 | 1 = male 0 = female |
Race (white) | 3330 | 75.56% | – | 0,1 | 1 = white 0 = non-white |
Marital status (married) | 3329 | 47.10% | – | 0,1 | 1 = married 0 = not married |
Working status (working) | 3330 | 97.36% | – | 0,1 | 1 = working, 0 = not working |
Geographic mobility (same city since age 16) | 3325 | 39.01% | – | 0,1 | 1 = same city since age 16, 0 = not the same city |
Number of children | 3327 | 1.597 | 1.483 | 0–8 | |
Place of living (urban) | 3330 | 89.13% | – | 0,1 | 1 = urban, 0 = rural |