TABLE 4.

Comparison of log‐rank test results for foals with RPR values below and equal or above the optimal cutoff of 0.0928.

Day of hospitalization	Foals at risk	Number of deaths	Survival rate	Lower 95% CI	Upper 95% CI
RPR <0.0928
0	186	6	0.968	0.943	0.993
1	116	6	0.918	0.873	0.965
2	100	1	0.909	0.861	0.959
3	80	1	0.897	0.846	0.952
RPR ≥0.0928
0	128	6	0.953	0.917	0.990
1	95	4	0.913	0.862	0.967
2	90	5	0.862	0.799	0.930
3	77	2	0.840	0.772	0.914