Duquesne University School of Nursing, 524 Fisher Hall, 600 Forbes Avenue, Pittsburgh, PA, 15282, USA,
Int J Behav Med. 2013 Dec;20(4):556-61. doi: 10.1007/s12529-012-9259-9.
Integral components of behavioral weight-loss treatment include self-monitoring of diet and physical activity along with feedback to participants regarding their behaviors. While providing feedback has been associated with weight loss, no studies have examined the impact of feedback frequency on weight loss or the mediating role of self-monitoring adherence in this relationship.
This study examined the effect of participant feedback frequency on weight loss and determined if this effect was mediated by adherence to self-monitoring in a behavioral weight-loss trial conducted in the USA.
Participants (N = 210) were randomly assigned to one of three self-monitoring methods with either no-daily feedback messages or daily feedback messages: (1) paper diary (PD), no-daily feedback; (2) personal digital assistant (PDA), no-daily feedback; and (3) PDA, daily tailored feedback messages (PDA + FB). The Sobel test via bootstrapping examined the direct effect of feedback frequency on weight loss and the indirect effect through self-monitoring adherence.
Receiving daily feedback messages significantly increased participants' self-monitoring adherence. A significant effect of feedback frequency on weight loss was noted; however, after adjusting for self-monitoring adherence, the effect of feedback frequency on weight loss was no longer significant. Feedback frequency had a significant indirect effect on weight loss through self-monitoring adherence.
Self-monitoring adherence mediated the effect of feedback frequency on weight loss. Increasing the frequency with which participants receive feedback could enhance self-monitoring adherence, a critical component of behavioral weight-loss treatment.
行为减肥治疗的基本组成部分包括饮食和身体活动的自我监测，以及向参与者提供有关其行为的反馈。虽然提供反馈与体重减轻有关，但尚无研究探讨反馈频率对体重减轻的影响，或自我监测依从性在这种关系中的中介作用。
本研究在美国进行的一项行为减肥试验中，考察了参与者反馈频率对体重减轻的影响，并确定这种影响是否通过自我监测依从性来介导。
参与者（N=210）被随机分配到三种自我监测方法中的一种，分别为：（1）纸质日记（PD），无每日反馈信息；（2）个人数字助理（PDA），无每日反馈信息；（3）PDA，每日定制反馈信息（PDA+FB）。通过 bootstrap 进行 Sobel 检验，以检验反馈频率对体重减轻的直接影响以及通过自我监测依从性的间接影响。
接收每日反馈信息显著增加了参与者的自我监测依从性。反馈频率对体重减轻有显著影响；然而，在调整自我监测依从性后，反馈频率对体重减轻的影响不再显著。反馈频率通过自我监测依从性对体重减轻有显著的间接影响。
自我监测依从性介导了反馈频率对体重减轻的影响。增加参与者接收反馈的频率可以增强自我监测依从性，这是行为减肥治疗的关键组成部分。
