Table 6: Number of litters on different floor types.

Floor type Total
TileConcreteWood

Disease present (cases)29 (2.25%)15 (2.64%)8 (1.28%)52
Disease absent (controls)1,261 (97.75%)554 (97.36%)617 (98.72%)2,432

Total1,2905696252,484

Chi squared = 2.9861; degrees of freedom = 2; value = 0.2247.