Exposure variables | HP exposure | Referent exposure | p-value |
Occupational exposure on longest held job | |||
Hay | 22 (11) | 5 (2) | 0.0005 |
Wheat flour | 12 (6) | 9 (4) | 0.2761 |
Sawdust | 34 (18) | 12 (5) | 0.0003 |
Plants | 37 (19) | 17 (7) | 0.0007 |
Compost | 24 (13) | 7 (3) | 0.0007 |
Animals or animal hairs | 31 (16) | 14 (6) | 0.0015 |
Birds or feathers | 20 (10) | 5 (2) | 0.0007 |
Insect cultivation | 18 (9) | 8 (3) | 0.0163 |
Seashells | 3 (2) | 0 (0) | 0.0681 |
Humidifier | 18 (9) | 11 (5) | 0.0705 |
Indoor fountain | 38 (20) | 24 (10) | 0.0105 |
Swamp cooler | 29 (15) | 11 (5) | 0.0007 |
Mould | 44 (23) | 16 (7) | <0.0001 |
Any work exposure | 107 (56) | 62 (27) | <0.0001 |
Home mould or mildew | |||
Walls | 54 (28) | 43 (19) | 0.0582 |
Bed | 6 (3) | 3 (1) | 0.3329 |
Storage areas | 15 (8) | 6 (3) | 0.0582 |
Air ducts | 4 (2) | 3 (1) | 0.6707 |
Damp carpet | 8 (4) | 9 (4) | 0.9023 |
Any of the above (any mould exposure) | 61 (32) | 57 (25) | 0.1175 |
Pets/animals in last 5 years | |||
Birds | 47 (24) | 24 (10) | 0.0004 |
Fish tank/reptiles/amphibians | 31(16) | 14 (6) | 0.0014 |
Mammalian pets | 141 (73) | 153 (67) | 0.1402 |
Frequently reported (≥10%) hobbies/pastimes | |||
Fine wood working | 23 (12) | 18 (8) | 0.1557 |
Weaving/working with fibres | 35 (18) | 15 (7) | 0.0004 |
Either hobby | 53 (28) | 30 (13) | 0.0002 |
Other home exposures | |||
Air conditioner | 128 (67) | 136 (59) | 0.2481 |
Desert cooler/humidifier | 35 (18) | 23 (10) | 0.0457 |
Hot tub or sauna | 42 (22) | 43 (19) | 0.5164 |
Water feature | 21 (11) | 60 (26) | 0.0005 |
Feather bedding | 91 (47) | 109 (48) | 0.9670 |
Composting | 47(24) | 44 (19) | 0.2867 |
Data are presented as n (%), unless otherwise stated. Bivariate p-value (Benjamini and Hochberg) by type of exposure group: work exposure; home mould or mildew; pets; hobbies; other home exposures. Combined multiple categories in italics not included in the Hochberg corrections.