Histogram showing the percentage of filters by filter life category in pre-filter CVVH vs. CVVHD (intention to treat analysis).
CVVH–Continuous venovenous hemofiltration; CVVHD–Continuous venovenous hemodialysis.Statistical modeling as described in the Methods was done to account for multiple filter observations from each patient. In the intention to treat analysis, the mean ratio of filter life for pre-filter CVVH compared to CVVHD was 0.79 (95% CI 0.65–0.97, p = 0.02), which is the ratio of mean filter life in CVVH over CVVHD, adjusted for covariates. In the per protocol analysis, the mean ratio of filter life was 0.82 (0.68–1.00, p = 0.04) (