INDEPTH Healthy Transitions to Adulthood Studies (IHTAS)

The Health and Health behaviours of young people (13-24) in Kilifi Analysis Plan

Mark Otiende

Questionnaire

• Alcohol consumption• Cigarette and tobacco use• Drug use (marijuana and glue)

• Major depression Inventory

• Cleaning teeth and hand washing practices

• Food and drinks

• Physical activities• Free time activities• Experiences at school and at home• Physical fights• Injuries in the past• Bullying

• Marital status• Pregnancy• Sexual behaviors

• Anthropometric measures

Objective 1

To estimate the prevalence of alcohol and substance abuse among young people

Limits of data 1. Study population: 13-24 year olds2. Data type: Categorical (Ordinal and Nominal)

Primary Endpoints 1. Prevalence of alcohol consumption2. Prevalence of tobacco3. Prevalence of marijuana and sniffing glue usage

Analysis sub-groups 1. Age strata2. Sex3. Source of substance4. Education5. Anthropometric measures

Analysis strategy: contingency tables & test for interaction

Objective 2

To assess the nutritional status and the dietary behaviors of young people

Limits of data 1. Study population: 13-24 year olds2. Data type: Categorical (Ordinal and Nominal)

Primary Endpoints 1. Prevalence of food inadequacy2. Prevalence of consumption of fruits 3. Prevalence of consumption of vegetables4. Prevalence of consumption of carbonated drinks5. Prevalence of consumption of fast food

Analysis sub-groups 1. Age strata2. Sex3. Hygiene practices4. Physical activities5. Education6. Anthropometric measuresAnalysis strategy: contingency tables & test for interaction

Objective 3

To describe the hygiene practices of young people

Limits of data 1. Study population: 13-24 year olds2. Data type: Categorical (Ordinal)

Primary Endpoints 1. Prevalence of oral health behaviors2. Prevalence of hand washing behaviors (using soap;

before eating; after using the latrine

Analysis sub-groups 1. Age strata2. Sex3. Substance use4. Education5. Anthropometric measuresAnalysis strategy: contingency tables & test for interaction

Objective 4

To determine the prevalence of major depression among young people

Limits of data 1. Study population: 13-24 year olds2. Data type: Categorical (Ordinal)

Primary Endpoints 1. Mean MDI total scores2. Prevalence of DSM-IV major depression3. *Cronbach’s alpha

Analysis sub-groups 1. Age strata2. Sex3. Substance use4. Education5. Anthropometric measures

Analysis strategy: contingency tables & test for interaction

Objective 4

To determine the prevalence of major depression among young people

Objective 4

To determine the prevalence of major depression among young people

Objective 5

To describe how physical violence and unintentional injury affect young people

Limits of data 1. Study population: 13-24 year olds2. Data type: Categorical (Ordinal)

Primary Endpoints 1. Prevalence of Physical activities and sedentary behaviors

2. Prevalence of physical fights3. Prevalence of physical injuries 4. Prevalence of bullying

Analysis sub-groups 1. Age strata2. Sex3. Substance use4. Education5. Anthropometric measures

Analysis strategy: contingency tables & test for interaction

Objective 6To describe the sexual behaviors (including sexual violence) that contribute to HIV infection, other STIs, and unintended pregnancies

Limits of data 1. Study population: 18-24 year olds2. Data type: Categorical (Ordinal and Nominal)

Primary Endpoints 1. Prevalence of pregnancies2. Prevalence of sex , usage of contraceptives and other

sexual behavior3. Prevalence of unwilling sex, forcefully or otherwise

Analysis sub-groups 1. Age strata2. Sex3. Substance use4. MDI5. Education6. Anthropometric measuresAnalysis strategy: contingency tables & test for interaction