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Exposure Variables

JS Jeffrey F. Scherrer
JS Joanne Salas
PL Patrick J. Lustman
CB Carissa van den Berk-Clark
PS Paula P. Schnurr
PT Peter Tuerk
BC Beth E. Cohen
MF Matthew J. Friedman
SN Sonya B. Norman
FS F. David Schneider
KC Kathleen M. Chard
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For our first objective, the exposure was PTSD status at the index date. The presence of PTSD was modeled as a time-invariant variable. For our second objective, obesity among patients with PTSD and patients without PTSD was the main exposure. Obesity was defined as a body mass index of 30 or more or an ICD-9 code for obesity (278.00 or 278.01). Obesity was treated as time dependent, meaning patients could contribute to both nonobese and obese follow-up time.

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