Adjusted odds ratios# for chronic obstructive pulmonary disease (COPD) according to region and definition used to identify COPD
| GOLD | LLN | |||||||
| Brittany | Franche-Comté | Brittany | Franche-Comté | |||||
| Cases | OR | Cases | OR | Cases | OR | Cases | OR | |
| Controls | 24/796 | 1.00 | 3/121 | 0.62 (0.17–2.25) | 13/796 | 1.00 | 1/121 | 0.40 (0.05–3.26) |
| Farmers (all) | 129/2925 | 1.00 | 65/862 | 1.55 (1.11–2.16) | 81/2925 | 1.00 | 36/862 | 1.41 (0.92–2.15) |
| Cattle | 34/1091 | 1.00 | 45/547 | 2.46 (1.49–4.06) | 18/1091 | 1.00 | 23/547 | 2.54 (1.29–5.01) |
| Crop | 8/327 | 1.00 | 4/84 | 1.22 (0.28–5.25) | 7/327 | 1.00 | 2/84 | 0.67 (0.11–4.20) |
| Other farm production | 44/769 | 1.00 | 16/211 | 1.34 (0.71–2.52) | 29/769 | 1.00 | 11/211 | 1.45 (0.68–3.05) |
Data are presented as n/N or OR (95% CI). Data presented in bold are statistically significant. GOLD: Global Initiative for Chronic Obstructive Lung Disease; LLN: lower limit of normal. #: odds ratio for COPD adjusted for age (as a continuous variable), smoking status (1–15 pack-years, >15 pack-years or <1 pack-year (as reference)) and sex (female as reference).