Hillier, F. and Batterham, A. and Crooks, S. and Moore, H.J. and Summerbell, C.D. (2012) 'The development and evaluation of a novel Internet-based computer program to assess previous-day dietary and physical activity behaviours in adults : the Synchronised Nutrition and Activity Program for Adults (SNAPA™).', British journal of nutrition., 107 (8). pp. 1221-1231.
The Synchronised Nutrition and Activity Program for Adults (SNAPA™) was developed to address the need for accurate, reliable, feasible, inexpensive and low-burden methods for assessing specific dietary and physical activity behaviours in adults. Short-term test–retest reliability of SNAPA™ was assessed in forty-four adults (age 41·4 (sd 17·3) years) who completed SNAPA™ twice in 1 day. Concurrent validity against direct dietary observation and combined heart rate and accelerometry was assessed in seventy-seven adults (age 34·4 (sd11·1) years). Test–retest reliability revealed no substantial systematic shifts in mean values of the outcome variables: percentage of food energy from fat (% fat), number of portions of fruit and vegetables (FV) and minutes of moderate-to-vigorous physical activity (MVPA). For lunchtime dietary intake, the mean match rate between food items reported using SNAPA™ and those observed was 81·7 %, with a phantom rate of 5·6 %. Pearson's correlations between SNAPA™ and the reference methods ranged from 0·27 to 0·56 for % fat, FV portions and minutes of MVPA. For % fat and FV intake, there was no fixed or proportional bias, and mean differences between the methods (SNAPA™ − reference) were 5·1 % and 0 portions, respectively. For minutes of MVPA, a fixed bias of − 28 min was revealed when compared with all minutes of MVPA measured by combined heart rate and accelerometry, whereas a proportional bias (slope 1·47) was revealed when compared with minutes carried out in bouts ≥ 10 min. SNAPA™ is a promising tool for measuring specific energy balance behaviours, though further work is required to improve accuracy for physical activity behaviours.
|Keywords:||Diet, Physical activity, Assessment, Internet.|
|Full text:||(VoR) Version of Record|
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|Publisher Web site:||http://dx.doi.org/10.1017/S0007114511004090|
|Publisher statement:||© Copyright Cambridge University Press 2012. This paper has been published in a revised form subsequent to editorial input by Cambridge University Press in "British journal of nutrition" (107: 8 (2012) 1221-1231) http://journals.cambridge.org/action/displayJournal?jid=BJN|
|Date accepted:||No date available|
|Date deposited:||09 July 2013|
|Date of first online publication:||April 2012|
|Date first made open access:||No date available|
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