Responses to the initial and follow-up surveys.
aThe email was sent to all users of the Enhanced TB Surveillance database. This included all administrative staff as well as well as staff working at national, regional and Primary Care Trust level, for whom the survey may not be relevant. bIt is not known how many people received the email via through the HPU cascade. cThis response rate is an underestimation because of the denominator used. dRespondents working at national, regional or PCT-level (n = 27) and those from Wales (n = 9) were excluded from this analysis. eEmail addresses not available from the initial survey (n = 2). fIn some cases it was not possible to link the follow-up response to the initial response (n = 10). Respondents working at national, regional or PCT-level and those from Wales (n = 4) were excluded from this analysis.