| Summary: | This longitudinal study evaluates the effect of bone mineral density screening on calcium intake and daily exercise of 196 healthy men older than 50 years over a period of 1 year. In this randomized clinical trial, the experimental group received personal bone density information via dual-energy X-ray absorptiometry (DXA). The men completed measures addressing knowledge, health beliefs, calcium intake, and exercise behaviors. Outcome measures were collected by a questionnaire at three time points: initial (Time 1 [T1]; pre-DXA), 6 months (Time 2 [T2]), and 12 months (Time 3 [T3]). Using structural equation modeling for data analysis, results indicated that men in the experimental group had a significantly higher T2 calcium intake than the control group, with no additional direct effect at T3. T1 daily calcium intake was significantly predicted by T1 health beliefs. Men with higher levels of health motivation tended to have higher initial levels of daily calcium intake. Personal knowledge of DXA results relate significantly to increased calcium intake.
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