Table 2.

Analysis of variance results, cluster mean priorities

Criterion	Mean square between clusters	Mean square within clusters	F‐ratio*	P‐value
Major criteria
Avoid cancer	0.1600	0.0024	65.89	<0.0001
Avoid side‐effects	0.0760	0.0028	27.62	<0.0001
Avoid false positives	0.0230	0.0009	25.80	<0.0001
Other considerations	0.0340	0.0014	24.46	<0.0001
Subcriteria
Frequency	0.7230	0.0034	210.48	<0.0001
Preparation	0.2660	0.0048	55.85	<0.0001
Procedure	0.6710	0.0058	114.73	<0.0001

*Differences from mean squares shown are due to rounding.