Table 2. Correlations^a in year-to-year variation in the number of cases of presumed passerine-associated Salmonella Typhimurium among passerines, cats and humans, and the number of selected passerine species counted by birdwatchers, Sweden, 2009–2016.

Correlation	PA STm in passerines	PA STm in cats	PA STm in humans
PA STm in passerines	NA	ρ = 0.7, p = 0.05	ρ = 0.5, p = 0.2
PA STm in cats	ρ = 0.7, p = 0.05	NA	ρ = 0.9, p = 0.005
Passerine count	ρ = 0.7, p = 0.06	ρ = 0.7, p = 0.06	ρ = 0.4, p = 0.4

NA: not applicable; PA: passerine-associated; STm: Salmonella Typhimurium.

^a Spearman’s rank correlation test.

Table 2. Correlationsa in year-to-year variation in the number of cases of presumed passerine-associated Salmonella Typhimurium among passerines, cats and humans, and the number of selected passerine species counted by birdwatchers, Sweden, 2009–2016.