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Table 2 Simulation Parameters

From: Estimating the effectiveness and cost-effectiveness of establishing additional endovascular Thrombectomy stroke Centres in England: a discrete event simulation

Parameter

Mean and Uncertainty; distribution and parameters

Source

Cost of EVT

£9116 (£2519); gamma (554.86, 16.42)

Balami [20]

Cost of Category A ambulance per minute

£6.86

PSSRU [18]

Survival (years) following stroke at 70

 mRS 0, median (IQR)

8.4 (4.7,14.1)

Estimated from results of

 mRS 1, median (IQR)

7.9 (4.3, 13.2)

DESa

 mRS 2, median (IQR)

7.2 (3.8, 12.3)

 

 mRS 3, median (IQR)

3.7 (1.4, 7.0)

 

 mRS 4, median (IQR)

2.7 (0.92, 5.8)

 

 mRS 5, median (IQR)

1.3 (0.42, 3.6)

 

 mRS 6, median (IQR)

NA

 

Utilities

 mRS 0

0.95, 0.08; beta (48.4, 2.55)

MR CLEAN [22]

 mRS 1

0.93, 0.13; beta (128.04, 9.64)

 

 mRS 2

0.83, 0.21; beta (222.24, 45.52)

 

 mRS 3

0.62, 0.27; beta (173.70, 106.46)

 

 mRS 4

0.42; 0.28; beta (173.15, 239.11)

 

 mRS 5

0.11; 0.28; beta (6.07, 49.12)

 

 mRS 6

0

 

Cost Year 1

 mRS 0

£6620

Dewilde et al. [17]

 mRS 1

£11,196

 

 mRS 2

£18,929

 

 mRS 3

£35,771

 

 mRS 4

£60,118

 

 mRS 5

£60,458

 

 mRS 6

£0

 

Yearly Cost Thereafter

 mRS 0

£2122

Dewilde et al. [17]

 mRS 1

£2836

 

 mRS 2

£4722

 

 mRS 3

£12,291

 

 mRS 4

£30,750

 

 mRS 5

£28,853

 

 mRS 6

£0

 

Proportion all strokes presenting early with LAO & NIHSS ≥6

10.6% (SD 0.1%)

McMeekin et al. [23]

Monthly probability of deteriorationb (increased mRS) before year 6

 

Rothwell et al. [10]

 0

0.006

 

 1

0.004

 

 2

0.002

 

 3

0.001

 

4,5

As mortality

 
  1. aEstimated from modelled mortality based on OXVASC, UK lifetables, Lothian Stroke Register
  2. bTwo or more point increase in mRS