Alcohol consumption and cigarette smoking: a health-risk behaviour among secondary school learners in South Africa.

Background: Health-risk behaviours such as tobacco smoking and alcohol are now identified among adolescents in most of the secondary schools of South Africa.

Objective: The study investigated the prevalence of smoking and alcohol use as health risk behaviours among secondary school learners in Thembisile Hani municipality of Mpumalanga province in South Africa.

Methods: A quantitative descriptive research design was used for the study.

Diagnostic accuracy of tri-ponderal mass index and body mass index in estimating overweight and obesity in South African children.

Background: Prevalence of obesity in youths has drastically increased in both industrialised and non-industrialised countries, and this transition resulted in an increased prevalence of chronic diseases.

Aim: The study aimed to comparatively examine prevalence of overweight and obesity status based on tri-ponderal mass index and body mass index in estimating body fat levels in South African children.

Setting: The study was conducted in Limpopo and Mpumalanga provinces of South Africa.