- Using multiple imputations to accommodate time-outs in online interventionsSusan M Shortreed
Group Heatlh Research Institute, Biostatistics Unit, Seattle, WA, United States
J Med Internet Res 15:e252. 2013..Prolonged periods of inactivity are commonly handled with a time-out feature and assigned a prespecified exposure duration. Unfortunately, this practice can lead to biased results describing program exposure...
- Estimating the effect of long-term physical activity on cardiovascular disease and mortality: evidence from the Framingham Heart StudySusan M Shortreed
Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
Heart 99:649-54. 2013..The impact of long-term PA is likely to differ. Our study objective was to estimate the effect of long-term adult-life PA compared with long-term inactivity on the risk of incident CVD, all-cause mortality and CVD-attributable mortality...