Validation and optimisation of an ICD-10-coded case definition for sepsis using administrative health data.

Objective: Administrative health data are important for health services and outcomes research. We optimised and validated in intensive care unit (ICU) patients an International Classification of Disease (ICD)-coded case definition for sepsis, and compared this with an existing definition. We also assessed the definition's performance in non-ICU (ward) patients.

Validity of administrative data in recording sepsis: a systematic review.

Introduction: Administrative health data have been used to study sepsis in large population-based studies. The validity of these study findings depends largely on the quality of the administrative data source and the validity of the case definition used. We systematically reviewed the literature to assess the validity of case definitions of sepsis used with administrative data.

Associations between aspects of friendship networks and dietary behavior in youth: Findings from a systematized review.

Objective: To gather and synthesize current evidence on the associations between aspects of friendship networks (e.g., friends' dietary behavior, popularity) and an individual's dietary behavior among children and adolescents.

Associations between aspects of friendship networks, physical activity, and sedentary behaviour among adolescents.

Background: Adolescent friendships have been linked to physical activity levels; however, network characteristics have not been broadly examined.

Method: In a cross-sectional analysis of 1061 adolescents (11-15 years), achieving 60 minutes/day of moderate-to-vigorous physical activity (MVPA) and participating in over 2 hours/day of sedentary behaviour were determined based on friendship network characteristics (density; proportion of active/sedentary friends; betweenness centrality; popularity; clique membership) and perceived social support.

Results: Adolescents with no friendship nominations participated in less MVPA.

Friendship networks and physical activity and sedentary behavior among youth: a systematized review.

Background: Low levels of physical activity and increased participation in sedentary leisure-time activities are two important obesity-risk behaviors that impact the health of today's youth. Friend's health behaviors have been shown to influence individual health behaviors; however, current evidence on the specific role of friendship networks in relation to levels of physical activity and sedentary behavior is limited. The purpose of this review was to summarize evidence on friendship networks and both physical activity and sedentary behavior among children and adolescents.