Attrition
RVAide-
The phase I design of the study measures a vaccine intention treatment effect immediately after participants view one of the four video treatment arms. None of the individuals terminated the survey after viewing the randomly assigned video treatment. Therefore, potentially confounding incomplete survey responses is not a concern here. We do, however, observe attrition between treatment at baseline (phase I) and post-treatment (phase II and phase III) and between phase I baseline and verified vaccination status (phase IV). Extended Data Table Extended Data Table Extended Data Table We employ multiple empirical strategies to test for attrition bias in our estimated treatment effects. First, we generate differential attrition rate tests to assess whether the rates of attrition are statistically significantly different across treatment and control groups. Extended Data Table We use the complete set of demographic measures collected in the pre-treatment survey to model attrition. We then re-estimate treatment effects employing inverse probability weighting and report the results in Supplementary Table In phase IV of the trial, we enlisted district health officials to verify the vaccination status of the trial participants. We were able to verify the vaccination status of 3,075 from the original 5,900 phase I intervention. The success of these vaccination verification efforts varied across the six health districts. Accordingly, we assess the sensitivity of our estimations to the different district verification samples. Supplementary Table Analyses were performed using R version 4.2.0, including the following packages (versions): htmlTable, stargazer, data.table, DescTools, ggpubr, stats (4.0.3), tidyverse (1.3.0), estimatr (0.28.0), readr (1.4.0), dplyr (1.0.5), lubridate (1.7.10), hdm (0.3.1), car (3.0.10), MASS (7.3.53), sandwich (3.0.0), misty (0.4.6), foreign (0.8.80), readxl (1.3.1), mlogit (1.1-1), nnet (7.3), aod (1.3.2), RVAide- Memoire (0.981-2) and quantreg (5.75) cobat (4.4.1), miceadds (3.16-18) and BART (2.9.4). Data collection was conducted using Qualtrics First Release 2005 (