http://archinte.jamanetwork.com/ en-us Mon, 01 Oct 2012 00:00:00 GMT Tue, 01 Jan 2013 00:48:48 GMT Silverchair editor@archinte.jamanetwork.com webmaster@archinte.jamanetwork.com http://archinte.jamanetwork.com/article.aspx?articleID=486881 Mon, 12 Jul 2010 00:00:00 GMT Mekary RA, Ding EL. <span class="paragraphSection">Television (TV) watching time poses unique challenges in analysis. Recently, Otten at al described the effects of reducing TV viewing time on energy intake and expenditure in overweight and obese adults in a randomized controlled trial. Although a reduction in TV viewing produced a significant increase in total daily energy expenditure among those randomized to TV restriction compared with the control group, the authors also found a nonsignificant decrease in energy intake in both groups. However, the analysis of TV viewing time was carried out using multivariate models that did not account for effects of varying time displacement and relative time substitution, nor did it control for the confounding effect of total activity time. An analysis of reducing TV watching time without considering these issues may lead to bias and incomplete interpretation of the effects of decreasing TV watching time.</span> 170 13 1173 1174 10.1001/archinternmed.2010.210 http://archinte.jamanetwork.com/article.aspx?articleID=486881 http://archinte.jamanetwork.com/article.aspx?articleID=486882 Mon, 12 Jul 2010 00:00:00 GMT Otten JJ, Littenberg B, Harvey-Berino J. <span class="paragraphSection"><strong>In reply</strong></span> 170 13 1173 1174 10.1001/archinternmed.2010.211 http://archinte.jamanetwork.com/article.aspx?articleID=486882