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Comparison of two different physical activity monitors


, : Comparison of two different physical activity monitors. Bmc Medical Research Methodology 7: 26-26

Background: Understanding the relationships between physical activity (PA) and disease has become a major area of research interest. Activity monitors, devices that quantify free-living PA for prolonged periods of time (days or weeks), are increasingly being used to estimate PA. A range of different activity monitors brands are available for investigators to use, but little is known about how they respond to different levels of PA in the field, nor if data conversion between brands is possible. Methods: 56 women and men were fitted with two different activity monitors, the Actigraph (Actigraph LLC; AGR) and the Actical (Mini-Mitter Co.; MM) for 15 days. Both activity monitors were fixed to an elasticized belt worn over the hip, with the anterior and posterior position of the activity monitors randomized. Differences between activity monitors and the validity of brand inter-conversion were measured by t-tests, Pearson correlations, Bland-Altman plots, and coefficients of variation (CV). Results: The AGR detected a significantly greater amount of daily PA (216.2 pl 106.2 vs. 188.0 pl 101.1 counts/min, P < 0.0001). The average difference between activity monitors expressed as a CV were 3.1 and 15.5% for log-transformed and raw data, respectively. When a conversion equation was applied to convert datasets from one brand to another, the differences were no longer significant, with CV's of 2.2 and 11.7%, log-transformed and raw data, respectively. Conclusion: Although activity monitors predict PA on the same scale (counts/min), the results between these two brands are not directly comparable. However, the data are comparable if a conversion equation is applied, with better results for log-transformed data.

US$19.90

PMID: 17592631

DOI: 10.1186/1471-2288-7-26


Other references

Koo, H.Jung.; Lee, B.Mu., 2004: Estimated exposure to phthalates in cosmetics and risk assessment. Some phthalates such as di(2-ethylhexyl) phthalate (DEHP) and dibutyl phthalate (DBP) and their metabolites are suspected of producing teratogenic or endocrine-disrupting effects. To predict possible human exposure to phthalates in cosmetics, the...

Lowenfels, A.B.; Sullivan, T.; Fiorianti, J.; Maisonneuve, P., 2005: The epidemiology and impact of pancreatic diseases in the United States. In the United States, acute pancreatitis, chronic pancreatitis, and pancreatic cancer are the most common pancreatic disorders requiring diagnosis and treatment. Pancreatic cancer is responsible for nearly 30,000 annual deaths and is the second mo...

Kumar, S.; Kampf, A.P., 2008: Combined effect of bond and potential disorder in half-doped manganites. We analyze the effects of both bond and potential disorder in the vicinity of a first-order metal insulator transition in a two-band model for manganites using a real-space Monte Carlo method. Our results reveal a novel charge-ordered state coexis...

Miletic, V.; Pongprueksa, P.; D.M.nck, J.; Brooks, N.R.; Van Meerbeek, B., 2016: Curing characteristics of flowable and sculptable bulk-fill composites. The aim of this study was to determine and correlate the degree of conversion (DC) with Vickers hardness (VH) and translucency parameter (TP) with the depth of cure (DoC) of five bulk-fill composites. Six specimens per group, consisting of Tetric...

Anonymous, 2013: Tratamiento de las complicaciones quirurgicas de la extraccion y del trasplante renal. La incidencia de las complicaciones quir rgicas del trasplante renal es del 1-30% seg n las series; suelen describirse de forma incompleta y su tratamiento pocas veces es motivo de consenso. La incidencia de las complicaciones generales de la ciru...

Bhagwandeen, B.S.; Taylor, S., 1988: Primary localized amyloidosis of the bladder with a monoclonal plasma cell infiltrate. A case of primary tumour-like amyloidosis of the urinary bladder is described. The plasma cell infiltrate around the amyloid deposition revealed monoclonality by both immunoperoxidase and immunofluorescence methods and the amyloid gave a staining...

Kondo, Junsei, 1996: Penmans formula and the pan evaporation. Journal of Agricultural Meteorology 52(2): 175-179

Cronberg G., 1983: Chrysophyte cysts and scales in lake sediments. Journal of Phycology 19(SUPPL): 14

Maslow, A.H.; Mintz, N.L., 1956: Effects of esthetic surroundings I Initial effects of three esthetic conditions upon perceiving energy and well-being in faces. The Journal of Psychology 41(2): 247-254

Niwa, Y.; Hamajima, N.; Atsuta, Y.; Yamamoto, K.; Tamakoshi, A.; Saito, T.; Hirose, K.; Nakanishi, T.; Nawa, A.; Kuzuya, K.; Tajima, K., 2004: Genetic polymorphisms of p73 G4C14-to-A4T14 at exon 2 and p53 Arg72Pro and the risk of cervical cancer in Japanese. To examine the possible association between cervical cancer and p73 G4C14-to-A4T14 in exon 2 and p53 Arg72Pro polymorphisms, an incident case-control study was conducted in Japanese. The cases were 112 cervical cancer patients. Controls were 320 h...