Table 1 Inclusion and exclusion criteria

Population

Children or adolescents between the age-group of 6 – 18 years.

Population

Children or adolescents not in the specified age-group and studies conducted on animal models.

Intervention

Policies that modify the four identified risk factors (unhealthy diet, physical inactivity, alcohol and tobacco use) and associated health related behaviors amongst the students either alone or as part of any intervention program.

Intervention

Policy components those are insufficiently described to enable replication. School policies focusing on differently abled students.

Context

Schools as a setting.

Context

Community, pre-schools and clinical settings.

Outcome

Prevalence of health related behaviors identified as risk factors for NCDs.

Study design

Editorials, library thesis, opinions and letters, papers with insufficient methodological details reported to allow critical appraisal of study quality, studies not in English language. Studies published before 1990.

Study Design

Any experimental or observational study design (randomized controlled trial controlled before-after study, quasi-experimental, interrupted time series, cohort study or cross-sectional study).