Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
Hypertension Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.
Nutr Diet. 2021 Jul;78(3):305-314. doi: 10.1111/1747-0080.12666. Epub 2021 Mar 30.
To validate a semi-quantitative food frequency questionnaire (SFFQ) and assess the dietary intake of Iranian adults.
This study was conducted among 113 healthy adults in Iran. We administered twelve 24-hour dietary recalls (24DRs) during a year as a reference method. The 165-item SFFQ was administered twice, along with the first and last 24DRs. To examine validity and reproducibility of SFFQ, the correlation coefficients (r) and de-attenuated correlation coefficients and intra-class correlation coefficient (ICC) between 24DRs and SFFQ were calculated. The Bland-Altman method was used to assess agreement between the two methods.
De-attenuated correlations varied from 0.42 (polyunsaturated fatty acids) to 0.62 (energy) (all P < .001) for nutrients and from 0.48 (oils and fats) to 0.65 (sweets) for food groups (all P < .05). We found reasonable reproducibility of SFFQ for both nutrients and food groups. ICC (95%CI) varied from 0.47 (0.15-0.74) for saturated fatty acids to 0.64 (0.47-0.76) for energy and from 0.43 (0.15-0.62) for oils and fats to 0.58 for grains (0.31-0.69). According to the Bland-Altman plots, we observed an acceptable level of agreement between the two methods.
We found reasonable relative validity and acceptable reproducibility of SFFQ. This SFFQ can be used to classify individuals based on their dietary intake in our population.
验证半定量食物频率问卷（SFFQ）并评估伊朗成年人的饮食摄入量。
本研究在伊朗的 113 名健康成年人中进行。我们在一年内进行了 12 次 24 小时膳食回忆（24DR）作为参考方法。共进行了两次 165 项 SFFQ 调查，并与前两次和最后两次 24DR 一起进行。为了检验 SFFQ 的有效性和重现性，计算了 24DR 与 SFFQ 之间的相关系数（r）、衰减相关系数和组内相关系数（ICC）。采用 Bland-Altman 法评估两种方法之间的一致性。
对于营养素，衰减相关系数从 0.42（多不饱和脂肪酸）到 0.62（能量）（均 P < 0.001），对于食物组，从 0.48（油和脂肪）到 0.65（甜食）（均 P < 0.05）。我们发现 SFFQ 对营养素和食物组均具有较好的重现性。ICC（95%CI）从 0.47（0.15-0.74）的饱和脂肪酸到 0.64（0.47-0.76）的能量，从 0.43（0.15-0.62）的油和脂肪到 0.58 的谷物（0.31-0.69）。根据 Bland-Altman 图，我们观察到两种方法之间具有可接受的一致性水平。
我们发现 SFFQ 具有合理的相对有效性和可接受的重现性。该 SFFQ 可用于根据我们人群中的饮食摄入量对个体进行分类。
