A cost study for mobile phone health surveys using interactive voice response for assessing risk factors of noncommunicable diseases

Table 4 Distribution of variable costs by type of incentive used and survey pricing mechanism, reported in USD

Country	Incentive per completed survey		Lottery incentive per completed survey
Country	Survey pricing per min	Survey pricing via flat fee	Survey pricing per min	Survey pricing via flat fee
Bangladesh	128,668	101,927	99,927	95,787
Colombia⁺	37,244	NA	NA	NA
Uganda^£	32,073	41,259	32,613	41,259

⁺Variable costs in Colombia do not change based on survey pricing mechanism as only price per minute was conducted
^£The lottery incentive amount used in Uganda was 20x the individual incentive per completed survey, resulting in the same cost per completed survey across fixed and lottery incentive arms of the trial

ISSN: 1478-7954