Among burned cane cutters, the job group with the highest workload and worst outcomes initially, there were decreasing rates of IKI (21% in H1 to 1% in H4, p<0.01), AKI (20/1000 worker-months to 8/1000 worker-months, p<0.01) and end-harvest leukocyturia (26% to 1%, p<0.01), and less rise in cross-harvest CRP (median 1.75-fold increase in H1 to 1.00 in H4, p<0.01). Here, CRP is linked to acute kidney injury.