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. 2015 Apr 13;10(4):e0123489. doi: 10.1371/journal.pone.0123489

Fig 3. The log-log plot to test the assumption of proportional baseline hazards.

Fig 3

Parallelism of the curves in a log-log plot indicates proportionality of the baseline hazard curves. This plot does not contradict the assumption of proportional baseline hazards for transitions into "death".