Validity and reliability of a food frequency questionnaire for community dwelling older adults in a Mediterranean country: Lebanon

Table 5 Concordance and Agreement between NAR of selected nutrients estimated by FFQ and mean 24HDR. (N = 76)

Nutrients	NAR 24HDR Median [IQR]	NAR FFQ Median [IQR]	% Agreement between same or adjacent quartile	Kappa	NAR Spearman Correlation	P value^b
VIT A	41.4 [27.8 - 76.2]	91.4 [55.7 - 154.1]	72.4%	0.447	0.152	0.016
VIT D	2.3 [1 - 6.3]	6.3 [3.7 - 9.5]	76.3%	0.526	0.457	< 0.01
VIT E	61 [42.8 - 79.2]	73.7 [57.3 - 92]	84.2%	0.684	0.623	< 0.01
VIT K^a	87.9 [39.9 - 484]	218.3 [141.7 - 386.1]	76.3%	0.526	0.366	< 0.01
VIT C	93.6 [56.3 - 157.7]	111.2 [76.9 - 155.3]	77.6%	0.553	0.439	< 0.01
VIT B1	71.2 [52.7 - 93.9]	82.5 [63.6 - 99.1]	85.5%	0.71	0.553	< 0.01
VIT B2	86 [70.8 - 108]	130.8 [100.5 - 154.1]	77.6%	0.553	0.412	< 0.01
VIT B3	100 [74.5 - 118.3]	115.6 [85.6 - 144]	82.9%	0.658	0.557	< 0.01
VIT B6	67.4 [49.7 - 87]	85.7 [68.2 - 107.3]	84.2%	0.684	0.529	< 0.01
VIT B9	66 [43.3 - 89.4]	73.9 [54.5 - 107.6]	72.4%	0.447	0.349	< 0.01
VIT B12	73.5 [39.3 - 123.4]	150.4 [106 - 232.3]	60.5%	0.211	0.166	0.151
Magnesium	78.7 [55.2 - 102.8]	91.9 [69.2 - 111.7]	84.2%	0.684	0.593	< 0.01
Calcium	39.4 [25.3 - 53.3]	58.5 [39.8 - 76.5]	82.9%	0.658	0.506	< 0.01
Phosphorus	99.1 [80.5 - 130.3]	135.6 [97.9 - 156.7]	80.3%	0.605	0.429	< 0.01
Iron	118.8 [78.8 - 147.1]	125.1 [94.8 - 156.3]	76.3%	0.526	0.402	< 0.01
Zinc	71.8 [56.6 - 100]	89.5 [71.5 - 117.5]	76.3%	0.526	0.433	< 0.01
Selenium	103.3 [75.2 - 157.3]	135.8 [109.3 - 176.5]	78.9%	0.579	0.49	< 0.01

Abbreviations: NAR Nutrient adequacy ratio, FFQ Food frequency questionnaire, 24HDR Twenty-four hours dietary recall, % Percentage, Vit Vitamin, IQR Interquartile range, CHO Carbohydrates
NAR was calculated as (nutrient estimated actual intake/ age and sex-specific nutrient RDA)
^a NAR for vitamin K was calculated using adequate intake (AI)
^b significant with p < 0.05

ISSN: 1475-2891