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Summary statistics for the experimental filter physical carbon content analysis, optical analyses, flowrate tests, and efficacy results in terms of log reduction values are given in Table 1.

Table 1

Summary of experimental filter testing

Group	Statistic	Carbon content (%)	Visual median tone		Flowrate (mL)		LRV
Group	Statistic	Carbon content (%)	HiROX	Leica	Initial	Final	LRV
Oxidizing	Mean	0.0284	172	190	44	29	3.66
	Std dev.	0.0064	17.7	3.2	5.8	4.9	0.48
	CV	0.224	0.103	0.017	0.131	0.167	0.131
Mid-range	Mean	0.216	110	92	49	29	4.09
	Std dev.	0.252	40.8	49.0	5.9	7.7	0.41
	CV	1.166	0.370	0.533	0.121	0.260	0.101
Reducing	Mean	1.423	57	39	63	35	2.84
	Std dev.	0.274	10.9	11.4	5.2	8.1	0.83
	CV	0.193	0.190	0.290	0.083	0.234	0.294
Overall	Mean	0.556	113	107	52	31	3.52
	Std dev.	0.667	54.1	69.9	9.6	7.1	0.79
	CV	1.200	0.479	0.652	0.185	0.228	0.225

Group	Statistic	Carbon content (%)	Visual median tone		Flowrate (mL)		LRV
Group	Statistic	Carbon content (%)	HiROX	Leica	Initial	Final	LRV
Oxidizing	Mean	0.0284	172	190	44	29	3.66
	Std dev.	0.0064	17.7	3.2	5.8	4.9	0.48
	CV	0.224	0.103	0.017	0.131	0.167	0.131
Mid-range	Mean	0.216	110	92	49	29	4.09
	Std dev.	0.252	40.8	49.0	5.9	7.7	0.41
	CV	1.166	0.370	0.533	0.121	0.260	0.101
Reducing	Mean	1.423	57	39	63	35	2.84
	Std dev.	0.274	10.9	11.4	5.2	8.1	0.83
	CV	0.193	0.190	0.290	0.083	0.234	0.294
Overall	Mean	0.556	113	107	52	31	3.52
	Std dev.	0.667	54.1	69.9	9.6	7.1	0.79
	CV	1.200	0.479	0.652	0.185	0.228	0.225

Std dev., standard deviation; CV, coefficient of variation.

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