Table 1.

Logistic regression on the risk of high allergy score (based on owner-reported allergic symptoms) against environmental land-use around the dog’s home at birth and the current home in all subsets. When current living environment becomes more urban, odds to become allergic are higher. Odds Ratio, OR = exp(estimate).

Environment	Subset	n low score	n high score	OR	P
Birth home	Full data	3604	422	1.04	0.484
	Allergy-tolerant breeds	2565	209	1.01	0.906
	Common breeds	477	24	1.17	0.444
Current home	Full data	4292	572	1.24	8.3e–07
	Allergy-tolerant breeds	3045	284	1.20	0.003
	Common breeds	584	39	1.51	0.014