A pilot study of a novel, incentivised mHealth technology to monitor the vaccine supply chain in rural Zambia.

Overall, there was no significant difference in average time-to-reply between the standard airtime incentive and double airtime incentive groups (13.3 hours (95% CI 2-24.5 hours) vs 7.5 hours (95% CI 3.6-11.5 hours) respectively, p = 0.42), nor was there a significant difference in average time-to-reply between the standard reminder and daily follow-up reminder group (16.4 hours (95% CI 4.3-28.5 hours) vs 4.0 hours (95% CI 1.9-6.1 hours) respectively, p = 0.08); although there was a trend for more timely replies in the daily follow-up reminder group, this did not reach statistical significance.

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