Table 2 Baseline characteristics of all participants and by intervention groups
Variables | N | All (n = 426) | Fish (n = 137) | Meat (n = 148) | Supplement (n = 141) | P-value a |
|---|---|---|---|---|---|---|
Sex n (%) | 426 | 0.512 | ||||
Male | 204 (47.9) | 61 (44.5) | 76 (51.4) | 67 (47.5) | ||
Female | 222 (52.1) | 76 (55.5 | 72 (51.4) | 74 (52.5) | ||
Age (years) mean ± SD)) | 426 | 14.6 ± 0.3 | 14.6 ± 0.3 | 14.6 ± 0.3 | 14.6 ± 0.3 | 0.718 |
BMI categoryb (kg/m2) | 396 | 0.250 | ||||
Underweight n (%) | 53 (12.4) | 21 (16.5) | 18 (13.2) | 14 (10.5) | ||
Overweight n (%) | 21 (4.9) | 4 (3.1) | 10 (7.4) | 7 (5.3) | ||
Obese n (%) | 7 (1.6) | 3 (2.4) | 0 (0) | 4 (3.0) | ||
Parental education level n (%) | 351 | 0.468 | ||||
Elementary/vocational school | 138 (39.3) | 45 (40.5) | 51 (42.5) | 42 (35.0) | ||
College/university | 213 (60.7) | 66 (59.5) | 69 (57.5) | 78 (65.0) | ||
Family income in NOKc n (%) | 348 | 0.421 | ||||
<200,000–749,999 | 74 (21.3) | 21 (19.1) | 21 (17.6) | 32 (26.9) | ||
750,000–1,249,999 | 178 (51.1) | 57 (51.8) | 66 (55.5) | 55 (46.2) | ||
1,250,000- > 2,000,000 | 96 (27.6) | 32 (29.1) | 32 (26.9) | 32 (26.9) | ||
Immigrantd n (%) | 351 | 8 (2.3) | 2 (1.8) | 2 (1.7) | 4 (3.3) | 0.633 |
Fish oil supplementse (n (%)) | 423 | 0.719 | ||||
Never | 228 (53.9) | 66 (48.2) | 81 (55.5) | 81 (57.9) | ||
1–3 times/month | 54 (12.8) | 18 (13.1) | 19 (13.0) | 17 (12.1) | ||
1–3 times/week | 47 (11.1) | 21 (15.3) | 14 (9.6) | 12 (8.6) | ||
4–6 times/week | 21 (5.0) | 7 (5.1) | 6 (4.1) | 8 (5.7) | ||
Every day | 73 (17.3) | 25 (18.2) | 26 (17.8) | 22 (15.7) |