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Summary of significant differences in bioluminescence mean RLU levels between instruments from different treatment groups
| Instrument | Significance | Higher mean RLU | |
|---|---|---|---|
| Use of any pretreatment group (multienzyme detergent, neutral pH detergent, or chlorhexidine scrub) compared with saline only | Needle drivers | P = 0.034 | Saline only |
| Neutral pH detergent compared with saline only | Needle drivers | P < 0.05 | Saline only |
