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Table 1 Parameters Table

From: Economic impact of screening for X-linked Adrenoleukodystrophy within a newborn blood spot screening programme

Parameter

Mean (95% Confidence Interval)

Reference

Base case parameters

Number of births per year

400,308

[22,23,24]

X-ALD incidence

1 in 22,361 (15,083, 33,153)

[3, 29,30,31,32]

Proportion

CCALD, AMN, Addison’s/Asymptomatic

0.53 (0.36, 0.69), 0.32 (0.18, 0.49), 0.15 (0.05, 0.28)

[14]

Non-X-ALD peroxisomal incidence

1 in 63,000 (33,897, 117,090)

[32]

Age at presentation CCALD

7 (6.76, 7.24)

[11]

Survival from onset CCALD

Weibull distribution

- shape parameter

- scale parameter

- correlation

á…Ÿ

á…Ÿ

−2.970

0.162

−0.8994

[11]

Time to CCALD progression (years)

1.6 (1.34, 1.86)

[11]

Mortality risk HSCT

0.08 (0.01, 0.21)

[10]

Proportion of CCALD currently undergoing early transplant (Family history)

0.33 (0.23, 0.43)

[10]

Proportion ALD-DRS 0, ALD-DRS1, ALD-DRS2, ALD-DRS 3–4, after HSCT

0.62 (0.35, 0.85), 0.23 (0.05, 0.48), 0.08 (0.002, 0.26), 0.08 (0.002, 0.26)

[10]

Proportion successful HSCT develop AMN

0.6 (0.19, 0.93)

[65]

Sensitivity

0.995

 

Specificity

1

 

Proportion of AMN mild

0.51 (0.38, 0.64)

[44]

Proportion of AMN developing adult onset cerebral X-ALD

0.63 (0.44, 0.8)

[40]

Age at presentation AMN (years)

35.3 (26.7, 43.9)

[40]

Time to development of adult onset cerebral X-ALD (years)

10.2 (3.3, 17.1)

[40]

Survival adult onset cerebral X-ALD (years)

3.4 (0.5, 6.3)

[40]

QALYs

See Additional file 2

 

Costs

See Additional file 3

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