FIG 6.

Analysis platform effect versus hospital effect on peak shifts and deletions. (A) The proportion of missing, shifted, or deleted peaks based on pairwise replicate comparisons. A peak is missing if it is detected in the reference profile but missing from its replicate. A missing peak can be either shifted or deleted. It is shifted if it is detected in the +1 or −1 position in the replicate profile. Otherwise, it is defined as “deleted.” *, P < 0.01; **, P < 0.001. (B) The proportion of deleted peaks per decile of peak intensity based on pairwise replicate comparisons.