[Potential biases in epidemiological studies using respondent-driven sampling method: a comparison between its face-to-face and online application.].

In epidemiological and social studies on populations without a sampling frame or that are hard to reach, respondent-driven sampling (RDS), under certain assumptions, has the potential to produce asymptotically unbiased and efficient population estimates for these populations. While RDS is typically conducted face-to-face, the online version (WebRDS) has gained attention due to its potential advantages, although its disadvantages have also raised concern. The objective of this study was to contrast these two formats at the level of application and potential biases, where the online version offers improved speed and lower costs but raises concerns about potential biases due to a lack of face-to-face instructions regarding definition of the social network size and peer-recruiting process.

Food Industry Compliance With the Display of Front-of-Package Warning Labels at the Final Phase (2020) of Chile's Labeling and Advertising Law.

To investigate food industry compliance with the display of front-of-package warning labels (FOPLs) on products that exceed regulatory thresholds for being high in calories, added sugars, sodium, or saturated fats after full implementation of Chile's Food Labeling and Advertising Law. In 2020, trained dietitians took pictures of nutritional information and FOPLs on packaged products in supermarkets. We categorized foods and beverages as requiring FOPLs (or not) using their nutritional composition and ingredients as set out in government guidelines.

Post menarcheal growth patterns in a contemporary cohort of Latino girls.

Introduction: Menarche is the last stage of pubertal development, which coincides with the completion of longitudinal growth. As a consequence of the lack of national and up-to-date data related to post-menarcheal (PM) growth, the aim of our work was to evaluate post menarcheal growth in a group of contemporary healthy Chilean girls followed, prospectively, until 4 years post-menarche.

Methods: This study was nested within the GOCS cohort, in a prospective fashion.

[Epidemiology and clinical features of malignant melanoma. Analysis of 274 cases].

Background: Malignant melanoma (MM) is the most fatal cutaneous neoplasm. Its incidence is increasing progressively, which cannot be explained only by early diagnosis. Chilean population, due to the geography of the country, has a very varied solar exposure.

Implementation of web-based respondent driven sampling in epidemiological studies.

Background: Respondent-driven sampling (RDS) is a peer chain-recruitment method for populations without a sampling frame or that are hard-to-reach. Although RDS is usually done face-to-face, the online version (WebRDS) has drawn a lot of attention as it has many potential benefits, despite this, to date there is no clear framework for its implementation. This article aims to provide guidance for researchers who want to recruit through a WebRDS.

Tumour budding in cutaneous squamous cell carcinoma: A novel prognosis risk factor.

Introduction: Most cutaneous squamous cell carcinomas (cSCC) have a good prognosis, there is a small group where metastasis and death occur and the evaluation of this risk is still cause for controversy. Tumour budding is a pattern of histological invasion that is an emerging risk factor in other solid tumours.

Objective: To examine the association between tumour budding and other known high-risk predictors in cSCC.

Sickness Presenteeism and Psychosocial Risk Factors According to Inequality Axes.

To assess the association between psychosocial risk factors (PSRs) and sickness presenteeism (SP) and examine possible differences according to the major axes of inequality in the labor market. Methods: Cross-sectional study based on a representative sample of the Spanish salaried population. Results: Although nearly all PSR show crude associations with SP, when adjusted for every other PSR, only the workers exposed to lack of role clarity (adjusted prevalence ratio [aPR], 1.

Incidence of lung cancer and air pollution in boroughs of Chile: an ecological study.

Lung cancer frequency has been progressively increasing; this has been linked to the use of inhaled tobacco and air pollution. In Chile, air pollution has reached alarming levels due to motor vehicle traffic, firewood burning for heating and minerals in urban areas; for this reason, our objective was to evaluate the association between the incidence of lung cancer and the concentration of the main air pollutants monitored in the country. We carried out a cross-sectional ecological study that evaluated the association between the average incidence of lung cancer in a 5-year period (2015-2019) with the average annual concentration of six atmospheric pollutants in the 5 years prior in 14 Chilean boroughs, using the population of beneficiaries of the Fundación Arturo-López-Pérez Cancer Institute.

Breast cancer incidence and the air pollution level in the communes of Chile: an ecological study.

There is evidence linking air pollutants associated with vehicular traffic such as polycyclic aromatic hydrocarbons with breast carcinogenesis. Epidemiological studies have shown conflicting results regarding air pollution and breast cancer risk, which could be explained by the multitude of other risk factors that could affect the association. In Chile, air pollution has reached alarming levels, either due to motorised vehicle traffic or the combustion of wood for heating; therefore, our objective was to evaluate the association between the incidence of breast cancer and the concentration of the main air pollutants monitored in the country.

Impact of the time interval between primary melanoma excision and sentinel node biopsy: A systematic review and meta-analysis.

Background: Obtaining a sentinel lymph node biopsy (SLNB) specimen is a standard staging procedure in the management of cutaneous melanoma. However, there is no consensus on the safe time interval between the primary melanoma biopsy procedure and the SLNB procedure.

Objective: We evaluated the association between time from biopsy to SLNB and patients' outcomes for melanoma.