Browsing by Author "Wolkon, Adam"
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- ItemApplication of pre-programmed PDA devices equipped with global GPS to conduct paperless household surveys in rural Mozambique.(2007-01-22) Krishnamurthy, Ramesh; Frolov, Anatoly; Wolkon, Adam; Vanden Eng, Jodi; Hightower, AllenPersonal digital assistants PDAs are extending how we use software normally associated with desktop and laptop computers As interface design improves and specialized software becomes available health professionals are choosing to usePDAs A logical next step to use PDAs is in remote areas where electronic data collection is needed and electricity is limited A test of PDAs equipped with global positioning system ability to improve household surveys in rural Mozambique was completed in February 2006
- ItemBed net ownership in Kenya: the impact of 3.4 million free bed nets.(2010-07-30) Hightower, Allen; Kiptui, Rebecca; Manya, Ayub; Wolkon, Adam; Vanden Eng, Jodi Leigh; Hamel, Mary; Noor, Abdisalan; Sharif, Shahnaz K; Buluma, Robert; Vulule, John; Laserson, Kayla; Slutsker, Laurence; Akhwale, WillisBACKGROUND In July and September 2006 3 4 million long lasting insecticide treated bed nets LLINs were distributed free in a campaign targeting children 0 59 months old CU5s in the 46 districts with malaria in Kenya A survey was conducted one month after the distribution to evaluate who received campaign LLINs who owned insecticide treated bed nets and other bed nets received through other channels and how these nets were being used The feasibility of a distribution strategy aimed at a high risk target group to meet bed net ownership and usage targets is evaluated METHODS A stratified two stage cluster survey sampled districts and enumeration areas with probability proportional to size Handheld computers PDAs with attached global positioning systems GPS were used to develop the sampling frame guide interviewers back to chosen households and collect survey data RESULTS In targeted areas 67 5 95 CI 64 6 70 3 of all households with CU5s received campaign LLINs Including previously owned nets 74 4 95 CI 71 8 77 0 of all households with CU5s had an ITN Over half of CU5s 51 7 95 CI 48 8 54 7 slept under an ITN during the previous evening Nearly forty percent 39 1 of all households received a campaign net elevating overall household ownership of ITNs to 50 7 95 CI 48 4 52 9 CONCLUSIONS The campaign was successful in reaching the target population families with CU5s the risk group most vulnerable to malaria Targeted distribution strategies will help Kenya approach indicator targets but will need to be combined with other strategies to achieve desired population coverage levels
- ItemPGMS: a case study of collecting PDA-based geo-tagged malaria-related survey data.(2014-09-04) Zhou, Ying; Lobo, Neil F; Wolkon, Adam; Gimnig, John E; Malishee, Alpha; Stevenson, Jennifer; Sulistyawati,; Collins, Frank H; Madey, GregUsing mobile devices such as personal digital assistants PDAs smartphones tablet computers etc to electronically collect malaria related field data is the way for the field questionnaires in the future This case study seeks to design a generic survey framework PDA based geo tagged malaria related data collection tool PGMS that can be used not only for large scale community level geo tagged electronic malaria related surveys but also for a wide variety of electronic data collections of other infectious diseases The framework includes two parts the database designed for subsequent cross sectional data analysis and the customized programs for the six study sites two in Kenya three in Indonesia and one in Tanzania In addition to the framework development we also present our methods used when configuring and deploying the PDAs to 1 reduce data entry errors 2 conserve battery power 3 field install the programs onto dozens of handheld devices 4 translate electronic questionnaires into local languages 5 prevent data loss and 6 transfer data from PDAs to computers for future analysis and storage Since 2008 PGMS has successfully accomplished quite a few surveys that recorded 10 871 compounds and households 52 126 persons and 17 100 bed nets from the six sites These numbers are still growing
- ItemUse of handheld computers with global positioning systems for probability sampling and data entry in household surveys.(2007-08-10) Vanden Eng, Jodi L; Wolkon, Adam; Frolov, Anatoly S; Terlouw, Dianne J; Eliades, M James; Morgah, Kodjo; Takpa, Vincent; Dare, Aboudou; Sodahlon, Yao K; Doumanou, Yao; Hawley, William A; Hightower, Allen WWe introduce an innovative method that uses personal digital assistants PDAs equipped with global positioning system GPS units in household surveys to select a probability based sample and perform PDA based interviews Our approach uses PDAs with GPS to rapidly map all households in selected areas choose a random sample and navigate back to the sampled households to conduct an interview We present recent field experience in two large scale nationally representative household surveys to assess insecticide treated bed net coverage as part of malaria control efforts in Africa The successful application of this method resulted in statistically valid samples quality controlled data entry and rapid aggregation analyses and availability of preliminary results within days of completing the field work We propose this method as an alternative to the Expanded Program on Immunization cluster sample method when a fast statistically valid survey is required in an environment with little census information at the enumeration area level