[Methodology and fieldwork logistics of a multilevel research study on the influence of neigbourdhood's characteristics on natives and Ecuadorian's mental health in Spain]. / Metodología y logística de campo de un estudio multinivel sobre la influencia en España de las características medioambientales en la salud mental de población autóctona y ecuatoriana inmigrante.

The methodological design, characteristics and fieldwork stage of a multilevel research study on the impact of the environmental characteristics on mental health in an autochthonous and immigrant population are described in this paper. Individual data were obtained using a core questionnaire 40 minutes length from home interviews of Spanish and Ecuadorian adults from September 2006 to January 2007. A random sample of 1186 people aged 18-55, with equal distribution of gender and nationality was obtained from Civil Registers of 33 areas (municipalities or neighbourhoods) of Madrid, Alicante, Almeria and Murcia, chosen by ethnic density and socioeconomic criteria. Previously, a pilot study was carried out. Socioeconomic indicators of neighbourhoods and selected communities were obtained from Municipal Registers and other secondary sources. Finally, 1144 people were interviewed (96%). Each person was contacted at home at two different times. The global response rate was 61%, higher among Ecuadorians (69%), who presented more problems of localisation (34%). Analyzing methods and fieldwork process the conclusion is that sample strategies for this type of population studies should be evaluated using feasibility criteria given time and money constraints, against the need to obtain representative samples of the target populations. There were serious shortcomings in the availability of social integration indicators at the neighbourhood level.

Violence in adulthood and mental health: gender and immigrant status.

The aim of this study was to describe perceived abuse in adult Spanish and Ecuadorian women and men and to assess its association with mental health. A population-based survey was conducted in Spain in 2006. Data were taken from a probabilistic sample allowing for an equal number of men and women, Spaniards and Ecuadorians. Mental disorder was measured with the General Health Questionnaire-28. The nine questions on exposure to physical, sexual, and psychological abuse during the previous year were self-administered. Multivariate logistic regression was used to assess the association between exposure to abuse and poor mental health, adjusting for potential confounders. The sample was composed of 1,059 individuals aged 18 to 54, 104 of whom reported physical, psychological, or sexual abuse. Some 6% refused to answer the questions on abuse. Overall, reported abuse ranged from 13% in Ecuadorian women to 5% in Spanish men. Psychological abuse was the most frequent. Half the abused women, both Spanish and Ecuadorian, reported intimate partner violence (IPV), as did 22% of abused men. Poor mental health was found in 61% of abused Spanish women (adjusted Odds Ratio [ORa] = 5.1; 95% CI: 1.8-14.4), and 62% abused Ecuadorian women (ORa = 4; 95% CI: 2-7.9), in 36% of abused Spanish men (ORa = 3; 95% CI: 0.9-10.7) and in 30% abused Ecuadorian men (ORa = 2.8; 95% CI: 1-7.7). Interpersonal violence is frequent in relations with the partner, the family, and outside the family, and it seriously affects the mental health. Ecuadorian women stand out as the most vulnerable group.