Panoramic images of white and black post-menopausal females evidencing carotid calcifications are at high risk of comorbid osteopenia of the femoral neck.

OBJECTIVES: Femoral neck fractures in older females resulting from decreased bone mineral density (BMD; osteopenia) are associated with increased morbidity and mortality. Bone mineralization inhibition is probably controlled by proteins which also foster vascular calcification. Therefore, we evaluated the relationship between calcified carotid artery plaque (CCAP) on panoramic images and BMD on dual energy X-ray absorptiometry (DXA) bone scans. METHODS: Images and hospital records identified by dentists defined two study groups (20 white females and 24 black females) having CCAP and an incidentally obtained bone scan. Ethnically matched (age±7 years, body mass index ±3 units) control groups with panoramic images devoid of CCAP and accompanying DXA scan were likewise constituted. A physician determined the BMD on the DXA. RESULTS: Females with CCAP had significantly (p = 0.03) poorer BMD at the femoral neck than those without CCAP. Although mean femoral neck BMD was significantly lower (p = 0.009) for white than for black females, there was no significant interaction between race and CCAP (p = 0.80). CONCLUSION: We observed a significant inverse association between the CCAP on panoramic images and femoral neck BMD in post-menopausal white females.

An evaluation of three self-report physical activity instruments for older adults.

PURPOSE: To assess the known-groups and construct validity of measures from the CHAMPS Physical Activity Questionnaire, Physical Activity Survey for the Elderly (PASE), and the Yale Physical Activity Survey (YPAS). METHODS: The three questionnaires were administered to a convenience sample of older adults (N = 87) recruited from community centers and retirement homes. Validation measures included the SF-36 measures of physical functioning, general health, mental health, and pain; body mass index; performance-based tests of lower body functioning and endurance; and Mini-Logger activity monitor data from ankle and waist sensors. Validity was estimated by testing hypotheses about associations between physical activity and validation measures. RESULTS: As hypothesized, differences in activity levels on all measures were found between older adults in retirement homes (less active) and community centers (more active) (P-values < 0.0001). Correlations of physical activity measures with performance-based measures ranged from 0.44 to 0.68, conforming to hypotheses; hypotheses regarding associations with the SF-36 measures were also confirmed. Body mass index was not correlated with any of the physical activity measures, contrary to hypotheses. Correlations of physical activity measures with Mini-Logger counts ranged from 0.36 to 0.59 (ankle) and 0.42 to 0.61 (waist) as hypothesized. Correlations among the measures from the three instruments ranged from 0.58 to 0.68. CONCLUSIONS: The PASE, YPAS, and CHAMPS each demonstrated acceptable validity, as all measures met nearly all hypotheses. Higher validity coefficients were found for subgroups (men, 65-74 yr, retirement home), suggesting that these instruments may perform better for certain segments of the older adult population.

Patterns of rehabilitation utilization after hip fracture in acute hospitals and skilled nursing facilities.

BACKGROUND: Hospitalized hip fracture patients may receive physical therapy (PT) in acute and/or postacute settings. Patterns of PT use may vary by patient, clinical, and hospital characteristics. These patterns can be analyzed if the acute and postacute stays are linked. OBJECTIVES: We classified the following patterns of PT use: acute PT only, skilled nursing facility (SNF) PT only, acute and SNF PT, and no PT. For each pattern, we compared (1) characteristics of hip fracture patients, (2) length of stay (LOS), and (3) discharge outcomes. SUBJECTS: The study included 187,990 hospitalized hip fracture patients derived from Medicare administrative data. MEASURES: Dependent variables were PT use patterns, acute hospital and SNF LOS, total episode days of care, and discharge destination. Independent variables were demographic, clinical, and facility characteristics. PT use patterns were also used as independent variables in the LOS and discharge destination models. RESULTS: Patterns of PT use were influenced by demographic and clinical characteristics such as age, race, and surgery type. Similarly, different LOS measures and discharge destinations varied by the PT use patterns. Patients receiving acute PT had longer acute LOSs; however, those patients who were subsequently transferred to SNFs had shorter SNF LOSs and total episode days of care. Patients utilizing PT were more likely to be discharged to home after the acute or SNF stay. CONCLUSIONS: Disparities in PT use exist for subgroups of patients such as the elderly and blacks. Providers should determine the most appropriate setting for initiation of PT to achieve better discharge outcomes with efficient use of resources.

Mobility-related function in older adults: assessment with a 6-minute walk test.

OBJECTIVE: To determine the usefulness of the 6-minute walk test as an integrated measure of mobility in older adults. DESIGN: Observational study. SETTING: Community centers and retirement homes in the Los Angeles area. PATIENTS: Eighty-six older adults without significant disease. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Assessments included the 6-minute walk, chair stands, standing balance, gait speed, body mass index, and self-reported physical functioning and general health perceptions. RESULTS: One-week test-retest reliability of the 6-minute walk was .95. As hypothesized, the 6-minute walk distance was significantly greater for active than for inactive older adults (p < .0001), moderately correlated with chair stands (r = .67), standing balance (r = .52), and gait speed (r = -.73). It had a low correlation with body mass index (r = -.07). The correlation of the 6-minute walk with self-reported physical functioning was .55, and its correlation with general health perceptions was .39. Self-report and performance measures explained 69% of the variance in 6-minute walk scores. CONCLUSIONS: The 6-minute walk test is reliable and is valid in relation to the performance and self-reported indicators of physical functioning tested in this study. It could serve as a useful integrated measure of mobility.