Effects of social approval bias on self-reported fruit and vegetable consumption: a randomized controlled trial.
Effects of social approval bias on self-reported fruit and vegetable consumption: a randomized controlled trial.
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社会认可偏见对自我报告的水果和蔬菜消费的影响：一项随机对照试验。
DOI：
10.1186/1475-2891-7-18
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发表时间：
2008-06-27
影响因子：
5.4
通讯作者：
Byers TE
中科院分区：
文献类型：
--
作者：
Miller TM;Abdel-Maksoud MF;Crane LA;Marcus AC;Byers TE
营养干预研究中饮食摄入量的自我报告可能会因受访者回答与预期标准一致的倾向而产生偏差（社会认可偏差）。本研究的目的是评估社会认可偏差对使用食物频率问卷 (FFQ) 和 24 小时回忆法获得的水果和蔬菜摄入量自我报告的潜在影响。一项随机盲法试验将接受潜在偏见提示的受试者报告的水果和蔬菜摄入量与对照受试者的水果和蔬菜摄入量进行了比较。受试者包括 163 名居住在科罗拉多州、年龄在 35 岁至 65 岁之间的女性，她们是通过电话随机选择和招募的，以完成她们被告知未来将进行的一项有关健康的电话调查。随机一半的受试者在采访前收到一封信，描述这是一项关于水果和蔬菜摄入量的研究。这封信包括对水果和蔬菜好处的简要说明、每天 5 次的贴纸和每天 5 次的冰箱贴。其余的人收到了同样的信，但仅将研究目的描述为更一般的营养调查，既没有水果和蔬菜的信息，也没有每日五次的材料。然后，在收到信件后 10 天内，对受试者进行电话采访，使用 8 项 FFQ 和有限的 24 小时回忆来估计水果和蔬菜的摄入量。所有访谈者对治疗情况均不知情。通过 FFQ 方法，看到潜在偏差提示的受试者报告比对照组受试者消耗更多的水果和蔬菜（每天 5.2 份与 3.7 份，p < 0.001）。根据 24 小时回忆法，干预组中有 61% 的人报告前一天吃过 3 次或以上水果和蔬菜，但对照组只有 32%（p = 0.002）。这些关联与年龄、种族/民族、教育水平、自我感知的健康状况以及自上次体检以来的时间无关。使用食物频率调查问卷或有限的 24 小时回忆来自我报告水果和蔬菜摄入量都容易受到严重的社会认可偏差的影响。营养干预试验中干预效果的有效评估可能需要对饮食改变进行客观测量。
Self-reports of dietary intake in the context of nutrition intervention research can be biased by the tendency of respondents to answer consistent with expected norms (social approval bias). The objective of this study was to assess the potential influence of social approval bias on self-reports of fruit and vegetable intake obtained using both food frequency questionnaire (FFQ) and 24-hour recall methods. A randomized blinded trial compared reported fruit and vegetable intake among subjects exposed to a potentially biasing prompt to that from control subjects. Subjects included 163 women residing in Colorado between 35 and 65 years of age who were randomly selected and recruited by telephone to complete what they were told would be a future telephone survey about health. Randomly half of the subjects then received a letter prior to the interview describing this as a study of fruit and vegetable intake. The letter included a brief statement of the benefits of fruits and vegetables, a 5-A-Day sticker, and a 5-a-Day refrigerator magnet. The remainder received the same letter, but describing the study purpose only as a more general nutrition survey, with neither the fruit and vegetable message nor the 5-A-Day materials. Subjects were then interviewed on the telephone within 10 days following the letters using an eight-item FFQ and a limited 24-hour recall to estimate fruit and vegetable intake. All interviewers were blinded to the treatment condition. By the FFQ method, subjects who viewed the potentially biasing prompts reported consuming more fruits and vegetables than did control subjects (5.2 vs. 3.7 servings per day, p < 0.001). By the 24-hour recall method, 61% of the intervention group but only 32% of the control reported eating fruits and vegetables on 3 or more occasions the prior day (p = 0.002). These associations were independent of age, race/ethnicity, education level, self-perceived health status, and time since last medical check-up. Self-reports of fruit and vegetable intake using either a food frequency questionnaire or a limited 24-hour recall are both susceptible to substantial social approval bias. Valid assessments of intervention effects in nutritional intervention trials may require objective measures of dietary change.
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影响因子：
5
作者：
Natarajan, L;Flatt, SW;Pierce, JP
通讯作者：
Pierce, JP
影响因子：
7.7
作者：
HEBERT, JR;CLEMOW, L;OCKENE, JK
通讯作者：
OCKENE, JK
影响因子：
2.4
作者：
SMITH, AF;JOBE, JB;MINGAY, DJ
通讯作者：
MINGAY, DJ
影响因子：
7.1
作者：
Horner, NK;Patterson, RE;Prentice, RL
通讯作者：
Prentice, RL
影响因子：
5.1
作者：
Stevens, VJ;Glasgow, RE;Smith, KS
通讯作者：
Smith, KS