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. 2018 Feb 15;7(2):e42. doi: 10.2196/resprot.8990

Table 2.

Final sample size by sex and age groups—the National Food, Nutrition and Physical Activity Survey, 2015-2016, (IAN-AF).

Age groups Children (<10 years) Adolescents (10-17 years) Adults (18-64 years) Elderly (≥65 years) Total


Male Female Male Female Male Female Male Female
Selected participants, n 1923 1965 952 988 8336 9384 3094 2541 29,183
Unknown eligibility, n 388 404 197 163 1677 1960 458 369 5616
Known eligibility, n 1535 1561 755 825 6659 7424 2636 2172 23,567
Eligible, n 1410 1422 658 719 5725 5971 2037 1693 19,635
Noneligible, n 125 139 97 106 934 1453 599 479 3932
Contact rate, n (%)a 1410
(78.42)
1422
(77.88)
658
(76.9)
719
(81.5)
5725
(77.34)
5971
(75.29)
2037
(81.64)
1693
(82.10)
19,635
(77.76)
Participants’ 1st interview









Cooperation rate,
n (%)b
769
(54.54)
745
(52.39)
351
(53.3)
349
(48.5)
1881
(32.86)
1563
(26.18)
429
(21.06)
466
(27.53)
6553
(33.37)

Participation rate,
n (%)c
769
(42.77)
745
(40.80)
351
(41.1)
349
(39.6)
1881
(25.41)
1563
(19.71)
429
(17.19)
466
(22.60)
6553
(25.95)
Participants with 2 dietary assessments









Cooperation rate,
n (%)b
667
(47.30)
660
(46.41)
319
(48.5)
313
(43.5)
1674
(29.24)
1428
(23.92)
358
(17.57)
392
(23.15)
5811
(29.60)

Participation rate,
n (%)c
667
(37.10)
660
(36.14)
319
(37.3)
313
(35.5)
1674
(22.62)
1428
(18.01)
358
(14.35)
392
(19.01)
5811
(23.01)

aContact rate: eligible/(eligible + unknown eligible individuals).

bCooperation rate: participants/eligible individuals.

cParticipation rate: participants/(eligible + unknown eligible individuals).