# Table 2

Results of comparison between FOBT and TCS (aggregated weights and priorities)

Criterion

Group A

Group B

Global priority

Local priority

FOBT weight

TCS weight

Global priority

Local priority

FOBT weight

TCS weight

Major criteria

Effectiveness

0.603

0.220

0.780

0.652

0.202

0.798

Costs

0.147

0.830

0.170

0.149

0.839

0.161

0.250

0.501

0.499

0.199

0.455

0.545

Subcriteria of 'effectiveness'

Mortality reduction rates

0.393

0.652

0.237

0.763

0.471

0.723

0.225

0.775

Detection rates

0.210

0.348

0.187

0.813

0.181

0.277

0.192

0.808

Subcriteria of 'costs'

Time cost

0.071

0.482

0.828

0.172

0.071

0.479

0.817

0.183

Out-of-pocket payment

0.076

0.518

0.832

0.168

0.078

0.521

0.832

0.168

Complications

0.163

0.650

0.670

0.330

0.092

0.461

0.790

0.210

False positives/negatives

0.088

0.250

0.185

0.815

0.107

0.539

0.168

0.832

Subcriteria of 'avoid false positives/negatives'

False positives

0.062

0.706

0.186

0.814

0.076

0.711

0.180

0.820

False negatives

0.026

0.294

0.182

0.818

0.031

0.289

0.177

0.823

Global priority of each subcriterion = local priority of each subcriterion * priority of the parent criterion. e.g., global priority of mortality reduction rates in Group A = 0.652*0.603 = 0.393.

Weight of the parent criterion is the sum of (weight * local priority) of each subcriterion. e.g., FOBT weight of effectiveness in Group A = 0.237*0.652+0.187*0.348 = 0.220.

Overall priority is the sum of (weight * local priority) of each major criterion.

Overall priority of FOBT in Group A = 0.220*0.603+0.830*0.147+0.501*0.250 = 0.380.

Overall priority of TCS in Group A = 0.780*0.603+0.170*0.147+0.499*0.250= 0.620.

Overall priority of FOBT in Group B = 0.202*0.652+0.839*0.149+0.455*0.199= 0.348.

Overall priority of TCS in Group B = 0.798*0.652+0.161*0.149+0.545*0.199 = 0.652.

Katsumura et al. BMC Health Services Research 2008 8:106   doi:10.1186/1472-6963-8-106