Table 1 descriptive statistics for variables at level 1 and level 2
From: Social disparities in body mass index (BMI) trajectories among Chinese adults in 1991–2011
Variable | N | Mean | SD | Minimum | Maximum | |
|---|---|---|---|---|---|---|
Level-1 variables | ||||||
Male | BMI | 10,588 | 22.34 | 2.91 | 12.68 | 57.01 |
T(time) | 10,588 | 7.99 | 7.06 | 0.00 | 20.00 | |
T2 | 10,588 | 113.74 | 135.41 | 0.00 | 400.00 | |
Female | BMI | 10,530 | 22.82 | 3.18 | 9.03 | 51.93 |
T(time) | 10,530 | 7.78 | 6.97 | 0.00 | 20.00 | |
T2 | 10,530 | 109.08 | 132.47 | 0.00 | 400.00 | |
Level-2 variables | ||||||
Male | age | 2496 | 31.68 | 7.80 | 18.00 | 45.00 |
BMI0(baseline BMI) | 2496 | 21.35 | 2.37 | 14.74 | 32.39 | |
Edu | 2496 | 0.22 | 0.42 | 0.00 | 1.00 | |
Income | 2496 | 8.04 | 0.93 | 0.99 | 11.10 | |
urban/rural | 2496 | 0.29 | 0.46 | 0.00 | 1.00 | |
Female | age | 2494 | 31.82 | 7.69 | 18.00 | 45.00 |
BMI0(baseline BMI) | 2494 | 21.69 | 2.66 | 13.95 | 40.34 | |
Edu | 2494 | 0.17 | 0.37 | 0.00 | 1.00 | |
Income | 2494 | 7.91 | 0.89 | 2.15 | 10.58 | |
urban/rural | 2494 | 0.28 | 0.45 | 0.00 | 1.00 | |