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Table 3 Annual cost of insecticide-treated wall liner (ITWL) and indoor residual spraying (IRS) in Tanzania (2019 USD)a

From: On the cost-effectiveness of insecticide-treated wall liner and indoor residual spraying as additions to insecticide treated bed nets to prevent malaria: findings from cluster randomized trials in Tanzania

Item ITWL IRS
Initial economic cost per person (2019 USD) $39.27 $5.69
Years of protection for one round 4.00 1.00
Annualizing factor at 3% annual discount rate 0.2612 1.000
Cost per person per year (2019 USD) $10.26 $5.69
Cost relative to ITWL 100.0% 55.4%
  1. a Annualizing calculations assume that payments are made at the beginning of each year. USD denotes United States dollars