Table 1. Characteristics of household expenditure quartiles, by participant age and marital status.
| Quartile | n | Monthly household expenditure (×1000 yen) | Age, y | Marital status | ||||
| Min | Max | Median | Mean | (Mean ± SD) | (% married) | |||
| Men | 1st (lowest) | 666 | 11.5 | 105.0 | 80.8 | 77.6 | 53.6 ± 7.3 | 79.4% |
| 2nd | 686 | 105.8 | 141.4 | 125.0 | 124.3 | 54.5 ± 7.3 | 90.5% | |
| 3rd | 642 | 142.9 | 198.0 | 165.0 | 164.9 | 54.0 ± 6.8 | 91.4% | |
| 4th (highest) | 670 | 200.0 | 6364.0 | 258.3 | 372.4 | 54.8 ± 6.7 | 87.5% | |
| Women | 1st (lowest) | 921 | 7.1 | 106.1 | 86.6 | 82.2 | 53.9 ± 7.2 | 74.6% |
| 2nd | 918 | 106.1 | 144.3 | 130.0 | 129.4 | 53.1 ± 7.4 | 86.6% | |
| 3rd | 921 | 145.0 | 200.0 | 173.2 | 171.0 | 52.7 ± 7.1 | 87.7% | |
| 4th (highest) | 902 | 201.2 | 6364.0 | 250.0 | 372.4 | 53.7 ± 7.1 | 90.4% | |