Trajectory of the body mass index of children and adolescents attending a reference mental health center.

Objectives: The primary objective was to describe the standardized body mass index (z-BMI) trajectory of children and adolescents admitted to a psychiatric reference center in Mexico City according to their diagnosis and medication use. The secondary objective was to compare z-BMI between antipsychotic users and non-users.

Methods: This is a retrospective cohort study.

Confirmatory Factor Analysis of the Transgender Knowledge, Attitudes, and Beliefs (T-KAB) Scale for the Mexican Population.

Transphobia is a result of the widespread lack of knowledge among the general population, together with prejudice based on irrational fear and hatred, of those who do not fit the dominant, socially established gender categories. Little is known about transgender-related knowledge, attitudes, and beliefs among the Mexican population, due to the lack of reliable, valid Spanish-language instruments. This study presents a Spanish translation of the Transgender Knowledge, Attitudes, and Beliefs (T-KAB) Scale and examines its psychometric properties for the Mexican population.

[Medical management of transgender children and adolescents].

Transgender or gender nonconforming (GN) persons identify themselves with a gender which is different from that correspondent to their birth sex. The demand for health services by families with transgender children or adolescents tends to increase. The prevalence of GN in children is unknown; however, it has been estimated to be > 1% in adolescents.

[Clinical research design and causality: does oral rotavirus vaccine cause intussusception?].

Design of clinical research whose purpose is to answer questions about causality can be classified in relation to four axes: the number of study groups, the implementation of an experimental maneuver, cause-effect directionality and source from which the data are collected. The basic designs used in epidemiology are the clinical trial, the cohort study, the case-control study and the cross-sectional survey. This text aims to facilitate the identification and understanding of each of these designs through examples related to the association between rotavirus vaccination and intussusception.