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Table 1 Parameter values used in the cost-effectiveness analysis of HIV treatment approaches in Mozambique

From: Framework for determining the optimal course of action when efficiency and affordability measures differ by perspective in cost-effectiveness analysis—with an illustrative case of HIV treatment in Mozambique

Parameter

Value(s)

Sensitivity analysis range

Probability distribution

Source(s)

Epidemiology

 Number of people \(\ge\) 15 years old living with HIV

1,970,000 PLHIV

N/A

N/A

[47]

 Age distribution of PLHIV \(\ge\) 15 years old

15–19: 4.38%

20–24: 9.92%

25–29: 15.25%

30–34: 16.37%

35–39: 15.82%

40–44: 14.22%

45–49: 10.89%

50–54: 5.58%

55–59: 3.31%

60–64: 1.97%

65–69: 1.18%

70–74: 0.65%

75–80: 0.32%

 > 80: 0.15%

N/A

N/A

[47]

 Distribution between CD4 count stages at time of ART initiation

CD4 > 500 cells/µL: 31%

CD4 350–500 cells/µL: 19%

CD4 200–349 cells/µL: 23%

CD4 < 200 cells/µL: 27%

N/A

N/A

Internal INS data, 2022

 Mortality rates per 100 person-years for individuals with untreated HIV, by CD4 stage (with 95% CI)

CD4 > 500 cells/µL: 0.6

CD4 350–500 cells/µL: 1.6

CD4 200–349 cells/µL: 4.2

CD4 < 200 cells/µL: 21.2

CD4 > 500 cells/µL: 0.1–2.0

CD4 350–500 cells/µL: 0.8–3.0

CD4 200–349 cells/µL: 2.8–5.7

CD4 < 200 cells/µL: 13.2–41.5

PERT distributions

[48]

 CD4 count decrease per year without ART (range)

60 cells/µL

50–80 cells/µL

PERT distribution

[49]

 CD4 count decrease per year while on ART (inadequate adherence, viral resistance)

14 cells/µL

0–20 cells/µL

PERT distribution

[50, 51]

 CD4 count increase per year while on ART

205 cells/µL

170–250 cells/µL

PERT distribution

[52, 53]

 12-month LTFU risk for 1-month clinical ARV distribution

20%

12–32%

PERT distribution

[32, 35]

 LTFU rate for 3-month community ARV distribution

5.1 per 100 person-years

1.59–8.61 per 100 person-years

PERT distribution

[54]

 Adjusted odds ratio of LTFU in 2 years with multi-month ARV distribution (compared to 1-month clinical distributions)

3-month: 0.79

6-month: 0.41

3-month: 0.76–0.82

6-month: 0.31–0.54

PERT distributions

[55]

 Probability of reengaging in care 12 months after LTFU with/without patient tracing

With: 37.1%

Without: 15.1%

With: 30–44%

Without: 8–22%

PERT distribution

[56]

 Proportion of PLHIV on ART taking first-line ARVs

95%

75–98%

PERT distribution

[57, 58]

 Distribution of first-line ARV regimens by base-drug

Dolutegravir: 99%

Efavirenz: 1%

N/A

N/A

Internal CNCS data, 2021

 Risk of ART failing while on second-line ARVs

15 per 100 person-years

13–18 per 100 person-years

PERT distribution

[59]

 Annual risk of progressing to second-line ARVs by base-drug regimen

Dolutegravir: 0.25%

Efavirenz: 2.5%

Dolutegravir: 0–0.5%

Efavirenz: 2.0–3.3%

PERT distributions

[57]

[60, 61]

 Discount rate

5%

N/A

N/A

[43]

Health effects

 DALY weight for one year while on ART, by CD4 stage

CD4 > 500 cells/µL: 0.078

CD4 350–500 cells/µL: 0.1

CD4 200–349 cells/µL: 0.15

CD4 < 200 cells/µL: 0.2

N/A

N/A

[62]

 DALY weight for one year without ART, by CD4 stage

CD4 > 500 cells/µL: 0.012

CD4 350–500 cells/µL: 0.27

CD4 200–349 cells/µL: 0.377

CD4 < 200 cells/µL: 0.58

N/A

N/A

[62]

Costs (in 2020 US$ with adjustment for purchasing power parity in Mozambique for non-tradeable cost components)

 Currency conversion

US$1 = 73.37 meticais

1 metical = US$0.014

N/A

N/A

[63]

 Annual cost to the health sector per patient treated for clinical 1-month ARV distributions (excluding ARV costs)

$134

$104–163

PERT distribution

[33]

 Average annual cost to the health sector per patient treated by community 3-month ARV distributions (excluding ARV costs)

$160

$125–226

PERT distribution

[64]

 Per person cost of first-line ARV regimens per month

Dolutegravir: $5.55

Efavirenz: $6.40

N/A

N/A

[65]

 Per person cost of second-line ARV regimen per month

Ritonavir: $23.15

N/A

N/A

[65]

 Annual cost to the health sector for viral load testing (per patient)

$26

$20–43

PERT distribution

[33]

 Average monthly cost to the health sector for case management and patient support (per patient)

$37.97

$25–50

PERT distribution

[66, 67]

 Per-person cost to travel by minibus taxi (chapa)

20 meticais (US$0.28) per hour

$0.05-$1.00

PERT distribution

[68]

 Average round trip transit time to ART provision site (by chapa)

 < 60 min: 51%

60–240 min: 43%

 > 240 min: 6%

N/A

N/A

[69]

 Average round trip transit time to ART provision site (walking)

6 h

1–24 h

PERT distribution

[68, 70]

 Proportion of patients who travel by chapa to ART services

57.5%

33–66%

PERT distribution

[71, 72]

 Proportion of distance a patient travels to a mobile brigade ARV distribution site versus to a clinic

33%

15–50%

PERT distribution

Author estimation

 Average patient wait time for ART

1 h

0.25–4 h

PERT distribution

[73]

 OOP expenditure on health per capita in Mozambique

$4.14 per year

N/A

N/A

[39]

 Adjusted net national income per capita in Mozambique

$393 per year

N/A

N/A

[74]

 GDP per capita in Mozambique

$467 per year

N/A

N/A

[75]

  1. All currency values are in 2020 US$
  2. ART antiretroviral therapy, ARV antiretroviral drug, CNCS Mozambique’s National AIDS Council, DALY disability-adjusted life year, GDP gross domestic product, HIV human immunodeficiency virus, INS Mozambique’s National Health Institute, LTFU lost to follow-up, OOP out-of-pocket, PLHIV people living with HIV