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Table 3 Parameter values for the state-transition models

From: Cost-effectiveness of eye care services in Zambia

Parameter

Mean (SE)

Distribution

Source

Costs (2010 US$)

   

Cataract surgery

92 (3.4)

Gamma

Cohort study

Corrective glasses

72 (7.8)

Gamma

Cohort study

Utility values

   

Baseline cataract

0.782 (0.017)

Beta

Cohort study

Six months after cataract surgery

0.832 (0.015)

Beta

Cohort study

Baseline refractive error

0.850 (0.022)

Beta

Cohort study

Six months after refractive error correction

0.925 (0.018)

Beta

Cohort study

Annual transition probabilities

   

Death

-

-

Zambia life tables

Deterioration after cataract surgery

0.04 (0.01)

Beta

Lundström and Wendel [15]

Deterioration after spectacles acquirement

0.05 (0.01)*

Beta

Assumed

  1. *In the first year, then increasing exponentially each cycle so that 90% of the cohort has deteriorated spectacles by the end of the five-year time horizon.