Assessing and adjusting for non-response in the Millennium Cohort Family Study

Table 2 Measures examined for association with Family Study response – not included in final response propensity model

Service Member Characteristic^a
Health behaviours
Daily number of caffeinated beverages
Physical health indices
VR-36 physical component score^b
Insomnia severity
Mental health indices
Major depression disorder^b
PTSD symptoms using the specific criteria^b
Posttraumatic growth
Self-mastery
Substance use
Potential alcohol dependence^b
Smoking status^b
Treatment
Days hospitalized because of illness or injury
Stress and relationship issues
Difficulties with spouse or partner^b
Little or no sexual desire/pleasure during sex
Stress at work, outside the home, or at school
Trauma
Physically hurt or unwanted sexual act

^aSignificant at the p < 0.0001 level
^bIndicates measures that were held out of stepwise selection process for purposes of model validation (see text for further description)
Note: We examined several additional variables, but they did not remain significant in the non-response propensity model and were somewhat duplicative of variables presented here, thus were not included in the table. These variables included: Panel 4 questionnaire mode; number of daily sedentary hours; anxiety; PTSD; alcohol-related problems; current tobacco use (not cigarettes); use of psychiatric medication; history of complementary and alternative medicine treatment; stress of taking care of family; number of lifetime stressful events

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