Description of the study population at baseline (2004, n=3175)
| Variables | Mean (SD)/% |
| Exposures | |
| Distance to nearest green space, m | 193 (139) |
| Distance to nearest green or blue space, m | 186 (136) |
| Distance to nearest green or agricultural space, m | 169 (129) |
| Distance to nearest green, blue or agricultural space, m | 164 (126) |
| Amount of green spaces within 300 m buffers, hectares | 3.46 (3.01) |
| Amount of green spaces within 500 m buffers, hectares | 9.66 (7.70) |
| Amount of green spaces within 1000 m buffers, hectares | 47.75 (27.61) |
| Outcome | |
| Total mental health score (MHI-5) | 73.2 (15.7) |
| Time-fixed characteristics | |
| Male, % | 44.5 |
| Born in the Netherlands, % | 93.0 |
| Educational level, % | |
| High | 31.3 |
| Middle | 24.7 |
| Low | 35.1 |
| Lowest | 8.9 |
| Time-varying characteristics | |
| Age, mean (SD) | 53 (13) |
| Marital status, % | |
| Married/partnership | 75.6 |
| Unmarried | 12.1 |
| Divorced | 6.9 |
| Widowed | 5.4 |
| Employment, % | |
| Employed | 50.3 |
| Unemployed | 7.4 |
| Retired | 25.7 |
| Non-employed | 16.6 |
| Household income, % | |
| <€1200 | 10.4 |
| €1200–€1800 | 20.1 |
| €1800–€2600 | 27.9 |
| €2600–€4000 | 29.1 |
| >€4000 | 12.5 |
MHI-5, Mental Health Inventory-5.