Table 2

Analysis of variance of both CT and MRI use rates (groups are the procedures)

SourceSSPer centdfMSFProb>F
MRIBetween groups0.03064690310.000989265.170
Within groups0.003571109583.73E-06
Total0.034221009893.5E-05
CTBetween groups0.00565871270.0002174.940
Within groups0.002324298312.80E-06
Total0.007981008589.30E-06
  • MRI Bartlett's test for equal variances: χ² (31)=4.1e+03 Prob>χ²=0.000

  • CT Bartlett's test for equal variances: χ² (27)=1.5e+03 Prob>χ²=0.000