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Table 3 Model parameters for probabilities and costs

From: A cost-minimisation analysis of performing point-of-care ultrasonography on patients with vaginal bleeding in early pregnancy in general practice: a decision analytical model

Parameters Ranges References
Probabilities
Usual practice
Referral from GP to private gynaecologist [0.00 – 1.00] Questionnaire
Completion at private gynaecologist [0.92 – 1.00] [23]
Referral from private gynaecologist to hospital [0.00 – 0.08] [23]
Referral from GP to hospital [0.00 – 1.00] Questionnaire
Intervention
Completion at GP [0.40 – 0.98] Questionnaire
Referral from GP [0.02 – 0.60] Questionnaire
Referral from GP to private gynaecologist [0.00 – 1.00] Questionnaire
Completion at private gynaecologist [0.92 – 1.00] [23]
Referral from private gynaecologist to hospital [0.00 – 0.08] [23]
Referral from GP to hospital [0.00 – 1.00] Questionnaire
Costs
General practitioner
Cost of ultrasonography scanner [1.30 – 13.77] [24]
Cost of consultation without ultrasonography [19.02 – 19.25] [39, 40]
Cost of ultrasonography training [3.35 – 5.81] [31, 42]
Cost of utensils [0.34 – 0.56] Expert opinion
Private gynaecologist   
Cost of consultation [96.78 – 97.99] [27, 41]
Hospital   
Cost of consultation [164.26 – 164.79] [25]
Patient-related parameters
Patients
Consultation time
General practitioner without ultrasonography [5-15] [24]
General practitioner with ultrasonography [13-26] [24]
Private gynaecologist [13-26] [24]
Hospital [13-26] [24]
Transportation distance
General practitioner [0.2—42] Unpublished registry data
Private gynaecologist [0.2—100] [37]
Hospital [0.2 – 100] [37]
Transportation time   
General practitioner [0.24 – 50.40] Unpublished registry data
Private gynaecologist [0.24 – 120] [37]
Hospital [0.24 – 120] [37]