Accelerometer Cut Points for Physical Activity Assessment of Older Adults with Parkinson's Disease.

OBJECTIVE: To define accelerometer cut points for different walking speeds in older adults with mild to moderate Parkinson's disease. METHOD: A volunteer sample of 30 older adults (mean age 73; SD 5.4 years) with mild to moderate Parkinson's disease walked at self-defined brisk, normal, and slow speeds for three minutes in a circular indoor hallway, each wearing an accelerometer around the waist. Walking speed was calculated and used as a reference measure. Through ROC analysis, accelerometer cut points for different levels of walking speed in counts per 15 seconds were generated, and a leave-one-out cross-validation was performed followed by a quadratic weighted Cohen's Kappa, to test the level of agreement between true and cut point-predicted walking speeds. RESULTS: Optimal cut points for walking speeds ≤ 1.0 m/s were ≤ 328 and ≤ 470 counts/15 sec; for speeds > 1.3 m/s, they were ≥ 730 and ≥ 851 counts/15 sec for the vertical axis and vector magnitude, respectively. Sensitivity and specificity were 61%-100% for the developed cut points. The quadratic weighted Kappa showed substantial agreement: κ = 0.79 (95% CI 0.70-0.89) and κ = 0.69 (95% CI 0.56-0.82) for the vertical axis and the vector magnitude, respectively. CONCLUSIONS: This study provides accelerometer cut points based on walking speed for physical-activity measurement in older adults with Parkinson's disease for evaluation of interventions and for investigating links between physical activity and health.

Is there a demand for physical activity interventions provided by the health care sector? Findings from a population survey.

BACKGROUND: Health care providers in many countries have delivered interventions to improve physical activity levels among their patients. Thus far, less is known about the population's interest to increase their physical activity levels and their opinion about the health care provider's role in physical activity promotion. The aims of this paper were to investigate the self-reported physical activity levels of the population and intention to increase physical activity levels, self-perceived need for support, and opinions about the responsibilities of both individuals and health care providers to promote physical activity. METHODS: A regional public health survey was mailed to 13 440 adults (aged 18-84 years) living in Ostergötland County (Sweden) in 2006. The survey was part of the regular effort by the regional Health Authorities. RESULTS: About 25% of the population was categorised as physically active, 38% as moderately active, 27% as somewhat active, and 11% as low active. More than one-third (37%) had no intentions to increase their physical activity levels, 36% had thought about change, while 27% were determined to change. Lower intention to change was mainly associated with increased age and lower education levels. 28% answered that physical activity was the most important health-related behaviour to change "right now" and 15% of those answered that they wanted or needed support to make this change. Of respondents who might be assumed to be in greatest need of increased activity (i.e. respondents reporting poor general health, BMI>30, and inactivity) more than one-quarter wanted support to make improvements to their health. About half of the respondents who wanted support to increase their physical activity levels listed health care providers as a primary source for support. CONCLUSIONS: These findings suggest that there is considerable need for physical activity interventions in this population. Adults feel great responsibility for their own physical activity levels, but also attribute responsibility for promoting increased physical activity to health care practitioners.

Self-reported adherence: a method for evaluating prescribed physical activity in primary health care patients.

BACKGROUND: Physical activity on prescription, as a method for increasing physical activity, has attracted attention in recent years. However, few studies have examined adherence as a primary outcome variable. The aim of this article was to examine self-reported adherence to individualized prescribed physical activity in a routine primary health care setting. METHODS: Patients receiving an individualized physical activity on prescription (FaR) for prevention or treatment of disease were recruited from 13 Swedish primary health care units. Self-reported adherence, physical activity level, readiness to change to a more physically active lifestyle, and well-being were measured with questions at baseline and after 6 months in 240 patients (mean age 51, range 12 to 80, 75% women). RESULTS: At the 6-month follow-up a majority (65%) of the patients reported adherence to the prescription. Partial adherence was reported by 19% and nonadherence by 16%. There was a relationship between adherence and well-being and stages of action or maintenance. CONCLUSIONS: The results demonstrate that adherence to physical activity on prescription is as good as adherence to other treatments for chronic diseases. This is significant because even a small increase in physical activity is important both on an individual level and for public health.

Predictors of healthy behaviours in Swedish school children.

AIM: To evaluate the impact of predictors of adopting a healthy lifestyle in Swedish schoolchildren. METHODS: A sample of 1409 Swedish schoolchildren (mean age 12.5 years) representative of different socio-economic and geographical living areas participated in a questionnaire-based survey on healthy habits and knowledge of healthy behaviour. A logistic regression analysis was performed to identify intrapersonal, social and environmental predictors of healthy habits. RESULTS: A normal body mass index (intrapersonal determinant) was connected to refraining from tobacco (P<0.05). For children to perceive family (P<0.001), themselves (P<0.001), or someone else (P<0.01) as a source of inspiration (social determinant) to be physically active was related to a high physical activity level. Paternal (P=0.01) and maternal (P<0.001) attention to the use of tobacco (social determinant) was of importance for children to refrain from such habits. To live in a socio-economically wealthy area (environmental determinant) was of importance for healthy food choices (P<0.01) and physical activity (P<0.05). Children from rural (P<0.01) areas (environmental determinant) were more physically active than children from urban areas. CONCLUSION: Social aspects such as parental support for physical activity and refraining from tobacco were found to be important for healthy behaviours. Moreover, environmental factors such as socio-economic and geographical living area favourably influenced food choices and physical activity. Parental attitudes and economy are therefore important for physical activity, healthy food choices and refraining from tobacco in children. Consequently, future interventions need to address the psychological and environmental influences of the home environment through the active involvement of parents, even in school-based interventions.