TABLE 1.
Participant baseline characteristics by quartile of egg intake
| Characteristic | Overall (N = 1024) | Egg consumption |
P value | |||
|---|---|---|---|---|---|---|
| Never or <1 /mo(N = 111) | 1–3/mo (N = 259) | 1/wk(N = 227) | ≥2/wk (N = 427) | |||
| AD diagnosis, no. (%) | ||||||
| Yes | 280 (27.3) | 36 (32.4) | 92 (35.5) | 55 (24.2) | 97 (22.7) | 0.002 |
| No | 744 (72.7) | 75 (67.6) | 167 (64.5) | 172 (75.8) | 330 (77.3) | |
| Age, y, mean (SD) | 81.38 (7.20) | 81.27 (7.08) | 82.74 (6.98) | 81.10 (7.16) | 80.74 (7.31) | 0.006 |
| Sex, no. (%) | ||||||
| Female | 766 (74.8) | 82 (73.9) | 210 (81.1) | 184 (81.1) | 290 (67.9) | <0.001 |
| Male | 258 (25.2) | 29 (26.1) | 49 (18.9) | 43 (18.9) | 137 (32.1) | |
| Education, y, mean (SD) | 14.87 (2.93) | 14.95 (2.93) | 14.45 (2.91) | 14.96 (3.05) | 15.07 (2.86) | 0.048 |
| BMI, kg/m2, no. (%) | ||||||
| Normal | 354 (34.6) | 52 (46.9) | 108 (41.7) | 84 (37.0) | 110 (25.8) | <0.001 |
| Overweight | 377 (36.8) | 31 (27.9) | 82 (31.7) | 89 (39.2) | 175 (41.0) | |
| Obese | 242 (23.6) | 22 (19.8) | 54 (20.9) | 45 (19.8) | 121 (28.3) | |
| Underweight or missing | 51 (5.0) | 6 (5.4) | 15 (5.8) | 9 (4.0) | 21 (4.9) | |
| Smoking status, no. (%) | ||||||
| Never smoked | 590 (57.6) | 67 (60.4) | 145 (56.0) | 132 (58.2) | 246 (57.6) | 0.282 |
| Former smoker | 403 (39.4) | 41 (36.9) | 100 (38.6) | 89 (39.2) | 173 (40.5) | |
| Current smoker | 31 (3.0) | 3 (2.7) | 14 (5.4) | 6 (2.6) | 8 (1.9) | |
| Physical activity, h/d, mean (SD) | 3.30 (3.71) | 3.09 (4.67) | 2.86 (3.33) | 3.29 (3.01) | 3.63 (3.97) | <0.001 |
| Cognitive activities, frequency, mean (SD) | 3.21 (0.67) | 3.13 (0.7) | 3.15 (0.65) | 3.25 (0.63) | 3.25 (0.69) | 0.073 |
| ApoE-ϵ4 high risk, no. (%) | ||||||
| No | 181 (17.7) | 25 (22.5) | 52 (20.1) | 36 (15.9) | 68 (15.9) | 0.282 |
| Yes | 843 (82.3) | 86 (77.5) | 207 (79.9) | 191 (84.1) | 359 (84.1) | |
| Cardiovascular condition, (%) | ||||||
| Hypertension | 57 | 51 | 58 | 56 | 58 | 0.588 |
| Diabetes | 15 | 10 | 13 | 12 | 18 | 0.077 |
| Myocardial infarction | 13 | 11 | 16 | 15 | 11 | 0.271 |
| Stroke | 11 | 8 | 14 | 12 | 9 | 0.151 |
| Dietary nutrients intake | ||||||
| Mean choline intake, mg/d, mean (SD) | 300.6 (86.7) | 238.9 (80.0) | 268.1 (81.1) | 297.8 (75.9) | 337.8 (79.5) | <0.001 |
| Total energy, kcal/d, mean (SD) | 1739.43 (545.10) | 1474.90 (493.75) | 1621.75 (523.38) | 1757.56 (532.03) | 1869.95 (539.09) | <0.001 |
Abbreviations: AD, Alzheimer’s disease; ApoE, apolipoprotein E; BMI, body mass index; SD, standard deviation.