Variable | 2013 | 2015 | Total | ||||||
Count | Mean | Variance | Count | Mean | Variance | Count | Mean | Variance | |
Co-residence | 2682 | 0.450 | 0.498 | 3123 | 0.451 | 0.498 | 5805 | 0.451 | 0.498 |
Retirement | 2642 | 0.435 | 0.496 | 2927 | 0.398 | 0.490 | 5569 | 0.416 | 0.493 |
Age | 2682 | 65.578 | 4.238 | 3123 | 65.720 | 4.154 | 5805 | 65.654 | 4.193 |
Gender | 2681 | 0.490 | 0.500 | 3123 | 0.481 | 0.500 | 5804 | 0.485 | 0.500 |
Education | 2680 | 3.688 | 2.071 | 2977 | 3.697 | 2.062 | 5657 | 3.693 | 2.066 |
Marriage | 2680 | 0.859 | 0.348 | 3065 | 0.866 | 0.340 | 5745 | 0.863 | 0.344 |
Assets | 2328 | 6.971 | 3.113 | 2815 | 7.276 | 3.133 | 5143 | 7.138 | 3.127 |
Health condition | 2661 | 1.987 | 0.694 | 2910 | 1.980 | 0.666 | 5571 | 1.983 | 0.680 |
Number of children alive | 2682 | 2.792 | 1.309 | 3123 | 2.636 | 1.289 | 5805 | 2.708 | 1.301 |
Number of deceased children | 2682 | 0.085 | 0.313 | 3123 | 0.133 | 0.458 | 5805 | 0.111 | 0.398 |
Self-care ability | 2652 | 6.564 | 1.867 | 3032 | 6.568 | 1.714 | 5684 | 6.566 | 1.787 |
House ownership | 2567 | 0.880 | 0.325 | 2955 | 0.855 | 0.352 | 5522 | 0.866 | 0.340 |