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  Indian J Med Microbiol
 

Figure 4: Long-term survival after surgery grouped by time of operation. The patients have been grouped into equal quartiles by date of surgery. The choice of quartiles is arbitrary to allow for easier reading of the graph. Long-term survival has improved over time (P = 0.0052)

Figure 4: Long-term survival after surgery grouped by time of operation. The patients have been grouped into equal quartiles by date of surgery. The choice of quartiles is arbitrary to allow for easier reading of the graph. Long-term survival has improved over time (<i>P</i> = 0.0052)