Table 2.
Mean energy intake, bodyweight, physical activity, and hunger and fullness ratings by portion size condition (SD)
| ‘Smaller than normal’ | ‘Small-normal’ | ‘Large-normal’ | |
|---|---|---|---|
| Total energy provided (kcal/d) | 5074 | 5485 | 5897 |
| Daily energy intake (kcal/d) | 2238 (490) | 2448 (584) | 2543 (592) |
| Breakfast | 441 (154) | 441 (175) | 429 (174) |
| Lunch (total) | 653 (203) | 695 (221) | 768 (210) |
| Portion | 313 (13) | 501 (56) | 658 (97) |
| Immediate additional intake | 339 (196) | 194 (190) | 110 (140) |
| Dinner (total) | 613 (162) | 752 (181) | 851 (214) |
| Portion | 338 (22) | 486 (79) | 628 (119) |
| Immediate additional intake | 275 (154) | 266 (147) | 223 (149) |
| Snack box | 454 (229) | 452 (239) | 428 (218) |
| Out of study intake (self-reported) | 78 (91) | 108 (126) | 68 (80) |
| Body weight (kg, Monday) | 77.0 (10.8) | 76.6 (10.9) | 76.8 (10.9) |
| Body weight (Friday) | 76.9 (11.0) | 76.69 (10.6) | 77.1 (11.0) |
| MVPA (mins/day)a | 70.2 (44.0) | 75.8 (42.0) | 74.9 (51.6) |
| MVPA (mins/day) b | 72.2 (8.0) | 71.3 (3.8) | 70.0 (3.9) |
| Discretionary LTPA (MET mins/week) | 1024.5 (907.7) | 1003.0 (985.1) | 1207.5 (1046.8) |
| Hunger c | 310.3 (104.8) | 288.9 (104.0) | 284.5 (112.8) |
| Fullness c | 432.8 (84.8) | 424.0 (79.7) | 432.8 (97.2) |
All n = 30 except a complete cases, n = 20. b Estimated marginal means and SE from multiply-imputed datasets. c Area under curve of meal ratings across the day. MVPA = FitBit measured moderate to vigorous physical activity with MET ≥3. Discretionary LTPA = leisure time physical activity from self-report. Immediate additional intake refers to additional helpings of the portion size manipulated food consumed at lunch and dessert consumed at dinner