Fig 6. Surivival plot for time to leave the herd through 250 DIM.

Data were right-censored at 250 d. The hazard of leaving the herd (cull or death) was not affected by treatment (P = 0.16). The hazard ratios for treatment comparisons were as follows: 1.85 (95% CI: 0.75–4.92) for SBE5 vs. Con and 0.72 (95% CI: 0.21–2.27) for SBE60 vs. Con.