Table 1.
Baseline Characteristics of HPFS Participants, by Response Status (n=7,166)
| Responders (n=1,866)* | |||
|---|---|---|---|
| Non-Responders (n=5,301) | Complete battery (n=1,587) |
Incomplete battery (n=279) |
|
| Age, mean ± SD | 71.3 ± 6.2 | 69.7 ± 5.4 | 73.0 ± 5.9 |
| Smoking, n (%) | |||
| Never | 2,132 (48.9%) | 651 (47.8%) | 104 (42.5%) |
| Former/Current | 2,226 (51.1%) | 712 (52.2%) | 141 (57.6%) |
| Body mass index, kg/m2, n (%) | |||
| <22 | 438 (8.8%) | 128 (8.4%) | 24 (9.0%) |
| 22–24.9 | 1,535 (31.0%) | 467 (30.7%) | 80 (30.0%) |
| 25–29.9 | 2,248 (45.4%) | 707 (46.5%) | 121 (45.3%) |
| 30+ | 733 (14.8%) | 220 (14.5%) | 42 (15.7%) |
| Physical activity, MET-hr/week, n (%) | 40.7 ± 38.6 | 42.1 ± 38.5 | 38.6 ± 36.4 |
| Alcohol, servings/day, n (%) | |||
| None | 2,078 (43.4%) | 619 (41.8%) | 107 (41.2%) |
| 1–2 | 1,974 (41.3%) | 630 (42.6%) | 110 (42.3%) |
| >2 | 734 (15.3%) | 231 (15.6%) | 43 (16.5%) |
| Nut Intake, servings/day, n (%) | |||
| <1/month | 529 (10.9%) | 156 (10.4%) | 41 (15.4%) |
| 1–3/month | 542 (11.1%) | 156 (10.4%) | 32 (12.0%) |
| 1–2/week | 1,459 (29.9%) | 468 (31.2%) | 82 (30.7%) |
| >2/week | 2,344 (48.1%) | 722 (48.1%) | 112 (42.0%) |
| Fish Intake, servings/day, n (%) | |||
| <1/month | 340 (7.0%) | 109 (7.3%) | 13 (4.9%) |
| 1–3/month | 565 (11.6%) | 178 (11.9%) | 32 (12.1%) |
| 1–2/week | 2,488 (51.2%) | 778 (51.9%) | 140 (53.0%) |
| >2/week | 1,466 (30.2%) | 433 (28.9%) | 79 (29.9%) |
| Diabetes, n (%) | 548 (10.3%) | 138 (8.7%) | 35 (12.5%) |
| Hypertension, n (%) | 3,110 (58.7%) | 843 (53.1%) | 173 (62.0%) |
| Myocardial infarction, n (%) | 393 (7.4%) | 110 (6.9%) | 25 (9.0%) |
| Stroke, n (%) | 138 (2.6%) | 29 (1.8%) | 9 (3.2%) |
| Current multivitamin use, n (%) | 3,403 (69.4%) | 1,027 (68.4%) | 176 (65.9%) |
*
Complete battery: participants who passed integrity criteria for all four Cogstate tasks; Incomplete battery: participants who did not pass integrity criteria for at least one Cogstate task