Prevalence of Swimming Puppy Syndrome in 2,443 Puppies during the Years 2006–2012 in Thailand

Table 4

Number of puppies per litter with presence or absence of disease.

Data	Disease present (cases)	Disease absent (controls)
Number of samples	52	641
Mean number of puppies per litter	1.92	3.65
Standard deviation	1.12	2.24

𝑡 = 9.6906; degrees of freedom = 88.859; 𝑃 < 0.001.