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. 2023 Jun 8;42:54. doi: 10.1186/s41043-023-00382-6

Table 7.

Marginal effects of explanatory variables on eating one or more servings of fruits and vegetables in Turkey using the bivariate probit model

Variables Prob (y1 = 1) Prob (y2 = 1) Prob (y1 = 1, y2 = 1) Prob (y1 = 1|y2 = 1) Prob (y2 = 1|y1 = 1)
ME*100 Std. Err ME*100 Std. Err ME*100 Std. Err ME*100 Std. Err ME*100 Std. Err
Discrete variables
Gender −5.121*** 1.084 −10.087*** 1.075 −7.065*** 0.961 −0.186 1.043 −5.981*** 0.763
Married 2.274** 1.011 3.235*** 0.998 2.663*** 0.888 0.766 0.982 1.636** 0.713
Elementary school 11.467*** 1.431 12.886*** 1.417 12.176*** 1.226 5.744*** 1.467 5.442*** 1.081
Secondary school 16.118*** 1.739 14.444*** 1.725 15.650*** 1.511 10.088*** 1.742 4.641*** 1.279
High school 14.934*** 1.709 14.422*** 1.685 14.896*** 1.484 8.776*** 1.705 5.152*** 1.247
Community college 19.704*** 2.269 18.778*** 2.242 19.558*** 1.982 11.716*** 2.238 6.592*** 1.636
College 17.344*** 1.960 16.274*** 1.942 17.119*** 1.713 10.454*** 1.937 5.593*** 1.421
Wage Job −1.494 1.833 −2.253 1.792 −1.799 1.611 −0.433 1.766 −1.180 1.268
Employer −2.207 2.166 0.683 2.137 −1.130 1.892 −2.842 2.129 1.546 1.546
Job seekers −5.154*** 2.154 −4.340** 2.103 −4.898*** 1.895 −3.378* 2.072 −1.256 1.486
Retired −1.502 2.382 −1.510 2.357 0.371 2.097 2.508 2.308 −1.908 1.678
Homemaker −1.425 1.963 −2.932 1.925 −2.014 1.728 0.017 1.890 −1.767 1.361
Overweight 1.917** 0.934 2.583*** 0.926 2.190*** 0.824 0.725 0.905 1.261** 0.658
Obese 4.599*** 1.220 3.568*** 1.212 4.255*** 1.082 3.182*** 1.169 0.871 0.852
Morbidly obese 4.358*** 1.845 6.953*** 1.841 5.392*** 1.608 1.055 1.837 3.753*** 1.350
General health insurance 1.617 1.400 −0.547 1.394 0.810 1.232 2.108 1.364 −1.171 0.998
Private health insurance 2.660 2.280 3.791* 2.263 3.118 2.028 0.892 2.166 1.920 1.575
Cycling 5.820*** 1.751 1.269 1.731 4.149*** 1.524 5.809*** 1.737 −1.560 1.265
Walking 10–29 min −2.965*** 1.169 −0.266 1.169 −1.969** 1.022 −3.169*** 1.158 1.106 0.853
Walking 30–59 min 0.731 1.253 3.794*** 1.258 1.904* 1.101 −1.265 1.234 2.783*** 0.912
Walking 1–2 h −1.338 1.532 2.286 1.526 0.027 1.343 −2.750* 1.506 2.471** 1.104
Walking > 2 h 2.159 2.006 3.580* 2.020 2.723 1.780 0.448 1.935 1.970 1.431
Resting 1.315 0.843 2.846*** 0.842 1.911*** 0.747 −0.093 0.811 1.746*** 0.596
Moderate physical job 2.849*** 0.884 4.306*** 0.878 3.434*** 0.783 0.821 0.849 2.257*** 0.620
Heavy physical job 2.395 2.012 3.812** 2.013 2.959* 1.794 0.584 1.911 2.055 1.402
Low income −9.766*** 1.867 −12.923*** 1.876 −11.070*** 1.575 −3.822** 1.982 −6.231*** 1.480
High income 2.313 1.870 6.750*** 1.854 4.026*** 1.685 −1.119 1.721 4.499*** 1.248
Marmara 3.489** 1.626 1.433 1.632 2.743** 1.407 3.113** 1.647 −0.383 1.219
Aegean −7.256*** 2.175 −7.911*** 2.174 −7.582*** 1.844 −3.768* 2.277 −3.243** 1.687
Mediterranean −9.103*** 1.896 −4.183** 1.894 −7.326*** 1.662 −7.879*** 1.864 0.636 1.369
Black Sea −15.469*** 1.637 −17.860*** 1.630 −16.541*** 1.401 −7.487*** 1.687 −7.731*** 1.247
Central Anatolia 1.267 1.738 −0.760 1.746 0.509 1.514 1.833 1.740 −1.189 1.287
Southeastern Anatolia −14.876*** 2.397 −15.610*** 2.342 −15.311*** 2.071 −8.059*** 2.394 −6.152*** 1.728
Continuous variables
Age 0.348*** 0.039 0.272*** 0.038 0.323*** 0.034 0.240*** 0.038 0.068*** 0.028
Sports Time 1.349*** 0.260 1.085*** 0.278 1.263*** 0.225 0.912*** 0.275 0.287 0.216
Tobacco −8.801*** 0.924 −2.652*** 0.926 −6.553*** 0.820 −8.382*** 0.890 1.757*** 0.655
Alcohol −0.324** 0.140 −0.060 0.140 −0.227* 0.126 −0.329*** 0.131 0.095 0.095
Number of children under 7 0.342 0.630 −1.488*** 0.623 −0.351 0.549 1.199** 0.626 −1.372*** 0.456
Number of kids ages 7–14 −1.039* 0.551 0.034 0.540 −0.641 0.475 −1.180** 0.556 0.492 0.402
Number of adults 0.155 0.317 0.199 0.311 0.173 0.280 0.063 0.304 0.094 0.219

ME shows marginal effects

*p < 0.10, **p < 0.05, ***p < 0.01