José Luis Santos

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PURPOSE To estimate the prevalence of physical activity during leisure time in adults from the 15 member states of the European Union and the relationship with sociodemographic variables. METHODS A representative sample, with approximately 1000 adults, aged 15 and upward, was selected from each member state to complete a questionnaire on attitudes to(More)
BACKGROUND Obesity is considered a protective factor for osteoporosis improving bone mass and maintaining higher levels of estrogen during menopause. OBJECTIVE To determine the association of obesity with bone mineral density (BMD), and its relationship with sex hormone levels. DESIGN A case-control study in Caucasian obese and non obese postmenopausal(More)
Meiotic chiasmata were analysed in metaphase I pollen mother cells (PMCs) of wild-type Arabidopsis thaliana and in two meiotic mutants. Fluorescence in situ hybridisation (FISH) with 45S rDNA and 5S rDNA as probes was used to identify the five chromosome pairs. A wild-type chiasma frequency of 9.24 per cell was found, consistent with estimated genetic(More)
BACKGROUND Inadequate eating behavior and physical inactivity contribute to the current epidemic of childhood obesity. The aim of this study was to assess the association between eating behavior scores and childhood obesity in Chilean children. DESIGN AND METHODS We recruited 126 obese, 44 overweight and 124 normal-weight Chilean children (6-12 years-old;(More)
The MATRICS Consensus Cognitive Battery (MCCB), developed by the National Institute of Mental Health (NIMH) Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) initiative, has been recommended as the standard battery for clinical trials of cognition-enhancing interventions for schizophrenia. Normative data for the MCCB has(More)
OBJECTIVE We evaluated metabolic parameters in Chilean women with polycystic ovary syndrome (PCOS) who were carriers and non-carriers of the glycine-to-arginine substitution at codon 972 (Gly972Arg) variant of insulin receptor substrate-1 and to assess insulin response after oral high- and low-glycemic loads METHODS In 146 women with PCOS and 97 healthy(More)
OBJECTIVE To evaluate the association between melanocortin-3 receptor common genetic polymorphisms with childhood obesity and eating behavior in Chilean families. METHODS Two hundred twenty-nine obese children (6-12 y old, body mass index >95th percentile of Centers for Disease Control and Prevention/National Center for Health Statistics, 2000) and 270(More)
OBJECTIVE To screen for mutations in the coding region of the melanocortin-4 receptor (MC4R) gene and to assess the association between the rs17782313 variant near MC4R with childhood obesity and eating behavior. SUBJECTS AND METHODS A cross-sectional sample of 221 obese Chilean children and 268 parents were incorporated in the study to assemble 134(More)
OBJECTIVE P50 gating in schizophrenia has contributed much to our understanding of the pathophysiology of the illness. We examined euthymic bipolar patients to determine if they also have a P50 gating deficit. METHOD P50 gating was measured in 81 euthymic bipolar patients (50 with a lifetime history of psychotic symptoms), 92 stable schizophrenic(More)
A number of studies have yielded controversial results on the association between polymorphisms in UCP2 and UCP3 genes with obesity and its comorbidities. The discrepancy among studies might be partially explained by the lack of consideration of the effect of adjacent loci in the same haplotype and the exclusion of key lifestyle factors in the statistical(More)