Table 1.
Baseline characteristics of participants in the HealthTrack study.
| Control group | Intervention group | Intervention + walnut group | |
|---|---|---|---|
| n | 126 | 124 | 127^ |
| Age (years)* | 43.80 ± 7.46 | 43.79 ± 7.97 | 42.10 ± 8.69 |
| Gender (% female) | 73% | 73% | 75% |
| Body weight (kg)* | 91.84 ± 14.69 | 91.86 ± 15.22 | 91.38 ± 15.51 |
| BMI (kg/m2)* | 32.49 ± 4.12 | 32.59 ± 4.25 | 32.63 ± 4.28 |
| kJ intake† | 9400 (7840–11 574) | 8666 (7176–11 004) | 8810 (7445–10 783) |
| Fish and seafood products and dishes (kJ) † | 122 (5–287) | 166 (17–328) | 128 (0–271) |
| Fruit products and dishes (kJ) † | 364 (164–602) | 315 (160–584) | 286 (135–490) |
| Vegetable products and dishes (kJ) † | 520 (353–848) | 519 (348–762) | 540 (387–831) |
| Discretionary foods and beverages (kJ) † | 2543 (1814–3931) | 2465 (1493–4020) | 2685 (1799–3898) |
| MET-mins/week†‡ | 876 (396–1523) | 921 (392–1552) | 1040 (568–2328) |
| DASS-21† | 13 (6–19) | 11 (7–19) | 11 (7–18) |
| SF-12 Physical component score†§ | 49 (43–54) | 50 (45–54) | 51 (45–55) |
| SF-12 Mental component score† | 49 (41–53) | 48 (38–55) | 48 (39–54) |
^n = 1 participant randomized to I was provided with walnuts, they were treated as IW for this per-protocol analysis
*Values are mean ± standard deviation
†Values are median (interquartile range)
‡Baseline sample size: control (n = 124), intervention (n = 122), intervention + walnut (n = 125)
§ Baseline sample size: control (n = 126), intervention (n = 123), intervention + walnut (n = 126)