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Table 1 Key Model Inputs

From: Is adjunctive pharmacotherapy in attention-deficit/hyperactivity disorder cost-effective in Canada: a cost-effectiveness assessment of guanfacine extended-release as an adjunctive therapy to a long-acting stimulant for the treatment of ADHD

Parameter

Value

Source

Initial health distribution:

Normal

0.00 %

Phase III trial [16]

Mild

3.52 %

Moderate

90.55 %

Severe

5.93 %

Utility inputs:

Normal

0.839

Lloyd et al. [31]

Mild

0.787

Moderate

0.578

Severe

0.444

Weekly medical costs:

Normal

$4.71

Derived from Guevara et al. [25], Schedule of Benefit and Fees, OHIP, OCCI

Mild

$4.76

Moderate

$13.63

Severe

$28.38

Weekly costs associated with productivity losses for parents of children with ADHD (societal perspective):

Normal

$14.60

Hakkaart-van Roijen et al. [29] Statistics Canada

Mild

$15.38

Moderate

$60.30

Severe

$125.10

Daily cost of ADHD medication, $CA:

GXR

$3.89

Quebec’s Medication List

MAS-XR (Adderall XR®)

$3.24

 

MPH-CR (Biphentin®)

$1.77

ODB

OROS-MPH (Concerta®)

$2.76

Market shares – Canada

OROS-MPH (generic)

$1.91

(except Quebec), IMS Brogan

LDX (Vyvanse®)

$3.75

 

Long-acting stimulants - Overall

$2.80

Weighted average cost

Percentage of patients taking long-acting stimulants:

GXR

Market shares – Canada (except Quebec), IMS Brogan

MAS-XR (Adderall XR®)

14.20 %

MPH-CR (Biphentin®)

15.30 %

OROS-MPH (Concerta®)

46.10 %

OROS-MPH (generic)

6.40 %

LDX (Vyvanse®)

18.00 %

  1. ADHD attention-deficit/hyperactivity disorder, GXR guanfacine extended release, LDX lisdexamfetamine dimesylate, MAS-XR mixed amphetamine salts extended release, MPH-CR methylphenidate hydrochloride controlled release, OCCI Ontatio Case Costing Initiative, ODB Ontario Drug Benefit Formulary, OHIP Ontario Health Insurance Plan, OROS-MPH osmotic release oral system methylphenidate