Barrier analysis for daily fruit and vegetable consumption among low income consumers in Ibadan, Nigeria

Barrier analysis is completed with at least 45 doers of the behavior of interest and 45 non-doers who do not practice the behaviour. In this case, the behaviour of interest was the consumption of an adequate quantity and diversity of fruits and vegetables by low income adults in the focal neighbourhoods. Doers and non-doers were identified based on multi-pass quantitative 24-hour dietary recall surveys that were completed with a subset of households, targeting an adult man and adult woman, with at least two days between the recalls. 241 women and 131 men completed the dietary recall surveys. The results were reviewed to identify respondents with higher and lower fruit and vegetable intakes. Doers consumed fruit in at least one of the two recall periods and always consumed at least one type of vegetable. Non-doers did not consume fruit in any of the recall periods. Lists of non-doers and doers were compiled according to gender and neighbourhood and sorted in a random order to interview following a quota sampling approach. Enumerators visited each household to request their participation in the survey.

障碍分析（Barrier analysis）的实施需纳入至少45名目标行为执行者与45名未实施该行为的非执行者。本次研究中，目标行为为重点街区内低收入成年人足量且多样地摄入水果与蔬菜。执行者与非执行者的识别基于多轮定量24小时膳食回顾（multi-pass quantitative 24-hour dietary recall）调查：研究选取部分家庭作为调查对象，针对家庭中的成年男性与成年女性开展调查，且两次调查回顾间隔至少两天。共有241名女性与131名男性完成了本次膳食回顾调查。研究人员对调查结果进行梳理，以筛选出水果与蔬菜摄入量较高与较低的受访者。其中，执行者需满足在两次回顾调查中至少有一次摄入水果，且每次均至少摄入一种蔬菜；非执行者则在所有回顾调查周期内均未摄入水果。研究人员按性别与街区对非执行者与执行者名单进行整理，并采用配额抽样法（quota sampling），将名单随机排序后开展访谈。调查员逐一走访各家庭，邀请其参与本次调查。