Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States of America.
Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States of America.
PLoS One. 2018 Jun 26;13(6):e0199751. doi: 10.1371/journal.pone.0199751. eCollection 2018.
Daily self-weighing (DSW) and daily activity tracking (DAT) are useful strategies for preventing weight gain among African American breast cancer survivors. However, self-monitoring behaviors vary over time, increasing risk of weight gain. This study explored the association of nonadherence to DSW and DAT with corresponding weight fluctuations among African American breast cancer survivors.
Using data from a 6-month randomized controlled trial, we conducted a secondary data analysis among women randomized into a DSW group (n = 13) and a DSW+DAT group (n = 11). DSW and DAT were captured from wireless scale and activity tracker data. Nonadherence to DSW was defined as one or more days without a weight measurement, and nonadherence to DAT was defined as one or more days without activity tracking. Generalized estimating equations were used to examine weight fluctuations in relation to nonadherence to DSW and DAT. Data analysis occurred from September 2016-April 2017.
Over the 6-month study period, women provided 119.2 ± 46.0 weight measurements and 121.9 ± 53.2 days of physical activity tracking. Nonadherence to DSW was associated with weight fluctuations. For every 1-day increase in nonadherence to DSW, weight increased by 0.031 kg (95% CI: 0.012, 0.050; p<0.01). Additionally, during periods of DSW and DAT weight decreased by 0.028 kg (95% CI: -0.042, -0.014; p<0.001) and 0.017 kg (95% CI: -0.030; -0.004) respectively.
Our findings suggest that nonadherence to DSW was associated with weight gain among breast cancer survivors. Weight loss was enhanced during periods of DSW and DAT.
每日自我称重（DSW）和每日活动追踪（DAT）是预防非裔美国乳腺癌幸存者体重增加的有用策略。然而，自我监测行为会随时间而变化，增加体重增加的风险。本研究探讨了非裔美国乳腺癌幸存者中不遵守 DSW 和 DAT 与相应体重波动的关系。
使用来自 6 个月随机对照试验的数据，我们对随机分为 DSW 组（n=13）和 DSW+DAT 组（n=11）的女性进行了二次数据分析。DSW 和 DAT 是从无线秤和活动追踪器数据中获取的。不遵守 DSW 的定义为一天或多天没有体重测量，不遵守 DAT 的定义为一天或多天没有活动跟踪。使用广义估计方程来检查不遵守 DSW 和 DAT 与体重波动的关系。数据分析于 2016 年 9 月至 2017 年 4 月进行。
在 6 个月的研究期间，女性提供了 119.2±46.0 次体重测量和 121.9±53.2 天的体力活动追踪。不遵守 DSW 与体重波动有关。不遵守 DSW 的天数每增加一天，体重就会增加 0.031 公斤（95%CI：0.012，0.050；p<0.01）。此外，在 DSW 和 DAT 期间，体重分别下降了 0.028 公斤（95%CI：-0.042，-0.014；p<0.001）和 0.017 公斤（95%CI：-0.030，-0.004）。
我们的研究结果表明，不遵守 DSW 与乳腺癌幸存者的体重增加有关。在 DSW 和 DAT 期间，体重减轻得到了增强。
