To assess change over the follow-up, asthma severity at the two surveys was defined using standardized data on respiratory symptoms, lung function and medication according to the Global Initiative for Asthma (GINA) Guidelines.
Fourth, variables in the DHS surveys are defined similarly across countries, and results are therefore comparable across countries (de Walque 2006).
Tumour extent, that, in the course of our previous surveys, was defined by Robson system, in this study, has been revised and classified according to the 2002 TNM system [ 15- 17], for the statistical analyses.
In this context, surveys are defined as assessments of specific populations at specific time points, whereas surveillance refers to ongoing assessment and interpretation of health data to inform policy [ 45].
Overall, 8.6% (1,079/12,533) of participants in the third survey were defined as having previously received VCT.
Participants who failed to complete or return the administered survey were defined as a non-responder.
Those who had been smokers before, but had stopped smoking at the time of survey, were defined as ex-smokers/ever smoked.
At waves 1, 2 and 3, respondents indicating that they had smoked in the week before the survey were defined as current smokers.
All ever-married women of reproductive age (15 49 years) who slept in the selected households the night before the survey were defined as being eligible for the present study.
All technical terms used in this survey were defined following the recommendations of the Consensus Statement on Injury Definitions and Data Collection Procedures in Studies of Soccer Injuries published under the auspices of the FIFA Medical Assessment and Research Center [ 16].
