Anne M Johnson|Andrew Copas|Bob Erens|Sundhiya Mandalia|Kevin Fenton|Christos Korovessis|Kaye Wellings|Julia Field
Effect of computer-assisted self-interviews on reporting of sexual HIV risk behaviours in a general population sample: a methodological experiment
The Royal Free Hospital|Mortimer Market Centre|University College London|The Royal Free Hospital|Mortimer Market Centre|University College London|National Institute of Economic and Social Research|The Royal Free Hospital|Mortimer Market Centre|University College London|The Royal Free Hospital|Mortimer Market Centre|University College London|National Institute of Economic and Social Research|University of London|London School of Hygiene & Tropical Medicine|National Institute of Economic and Social Research
objectives develop methods maximize accuracy reporting hiv risk behaviours general population survey assessed feasibility using computerassisted selfcompletion interview casi comparison penandpaper selfcompletion interview papi design probability sample survey residents aged 1644 years britain alternate assignment addresses interview casi 462 papi 439 methods personal interviews exploring demographic sexual behaviour variables principal outcome measures impact casi relation papi data quality rates reporting range behaviours results total 901 interviews completed 829 individuals eligible accepted selfcompletion module internal consistency data items greater casi papi item nonresponse lower overall significant difference rates reporting casi papi main effect casi compared papi generalized estimating equation gee analysis 95 ci 104 092117 variables also examined individually including homosexual partnership adjusted 126 95 ci 069229 payment sex adjusted 068 95 ci 029159 masturbation adjusted 089 95 ci 066122 five partners past 5 years 085 95 ci 061119 conclusion found evidence consistent effect casi rates reporting sexual hiv risk behaviours sample casi resulted improvement internal consistency reduction missed questions