Indices | Items | Double-income nuclear family | Single-mother | P-value | ||
n=131 | n=14 | |||||
Mean n | SD % | Mean n | SD % | |||
Age rangea | 20s | 17 | 12.98 | 5 | 35.71 | 0.0637 |
30s | 87 | 66.41 | 5 | 35.71 | ||
40s | 26 | 19.85 | 4 | 28.57 | ||
50s | 1 | 0.76 | 0 | 0 | ||
Type of householda | Parents and their children (double income) | 131 | 100 | 0 | 0 | <0.0001 |
Mother and children | 0 | 0 | 10 | 71.43 | ||
Grandparents, mother, and children | 0 | 0 | 4 | 28.57 | ||
Mother's employment statusa | Full-time worker | 83 | 66.94 | 5 | 35.71 | 0.1213 |
Dispatched employee | 3 | 2.42 | 1 | 7.14 | ||
Part-time worker | 34 | 27.42 | 8 | 57.14 | ||
Executive officer | 1 | 0.81 | 0 | 0 | ||
Self-employed business | 1 | 0.81 | 0 | 0 | ||
Others | 2 | 1.61 | 0 | 0 | ||
Work hours/dayb | (Mean, SD) | 8.21 | 1.59 | 8.58 | 1.04 | 0.5748 |
Working on weekendsa | 71 | 54.20 | 10 | 71.43 | 0.2661 | |
Working at nighta | 7 | 5.34 | 0 | 0 | 1 | |
Monthly disposable income (Yen)b | ≥100,000 to <150,000 | 1 | 0.79 | 2 | 14.29 | <0.0001 |
≥150,000 to <200,000 | 6 | 4.76 | 6 | 42.86 | ||
≥200,000 to <250,000 | 7 | 5.56 | 0 | 0 | ||
≥250,000 to <300,000 | 7 | 5.56 | 4 | 28.57 | ||
≥300,000 to <350,000 | 21 | 16.67 | 0 | 0 | ||
≥350,000 to <400,000 | 21 | 16.67 | 0 | 0 | ||
≥400,000 | 63 | 50 | 2 | 14.29 |