Influence of proxy respondents in children's health interview surveys.

STUDY OBJECTIVES: To study the influence of the proxy respondent on health interview surveys in children. DESIGN: Cross sectional study. SETTING: Children under the age of 15 years drawn from the general population of Catalonia, Spain. PARTICIPANTS: The Catalan Health Interview Survey consisted of a multistage probability sample representative to the population of Catalonia. The sample size was 2433 children younger than 15 years of age. The interviews were answered by proxy respondents (the mother, father, or other carer), with the questionnaire adapted for the proxy respondent. Logistic regression models were used to analyse the relation between the proxy respondent's characteristics and health status and health care utilisation, controlling for the effect of sociodemographic factors. MAIN RESULTS: Proxy respondent's characteristics influenced the reports of chronic conditions and accidents within the last year. Proxy respondents over 55 years (OR = 0.47; 95% CI = 0.26, 0.82), men (OR = 0.69; 95% CI = 0.53, 0.89), the father (OR = 0.66; 95% CI = 0.50, 0.89), and the grandparents (OR = 0.49; 95% CI = 0.26, 0.89), reported a lower rate of chronic conditions. Age of the proxy 55 years or greater (OR = 0.41; 95% CI = 0.20, 0.82), men (OR = 0.70; 95% CI = 0.52, 0.94), fathers (OR = 0.68; 95% CI = 0.49, 0.92), and grandparents (OR = 0.40; 95% CI = 0.18, 0.85) showed a lower probability to report accidents. No variables related to the proxy were associated with physician visits or hospitalisation in the previous year. CONCLUSIONS: Selected characteristics of the proxy respondent can influence responses to health surveys involving children. A minimum set of basic data should be collected from the proxy respondent to evaluate different patterns of response.

Mental health expectancy: an indicator to bridge the gap between clinical and public health perspectives of population mental health.

Mental health indicators generally used in public health are derived from mortality statistics, but they do not reflect the impact that disability due to mental disorders has on population health. The present study proposes a global indicator of population mental health which combines both mortality and morbidity data. The data used were the results of a Health Interview Survey, including the 12-item version of the General Health Questionnaire, mortality life-tables for the general population, and data from a two-step epidemiological study used to assign the probability of case status. The results are calculated for the Catalonia region in north-east Spain. Life expectancy and mental health expectancies at all ages were found to be higher for women than for men. Men were found to have a higher total life expectancy in good mental health. The feasibility and potential areas of application of this generic mental health index are discussed.