No intervention | Covenant intervention | Health surveillance intervention | ||||
New cases | Disease years | New cases | Disease years | New cases | Disease years | |
Rhinitis symptoms | 2436 | 20 591 | 2026 | 19 012 | 1890 | 23 021 |
Asthma symptoms | 1404 | 11 968 | 1098 | 9885 | 493 | 6649 |
Work disability | 555 | – | 469 | – | 333 | – |