Table 3 Relationship between lifestyle factors and distorted body image (underestimation) among girls (Japan; 2005–2009)
| Â | Body image perception, n (%) | Adjusteda OR (95Â % CI) | P-value | |
|---|---|---|---|---|
| Â | Correct | Underestimated | ||
Exercise | Â | Â | Â | Â |
  Daily | 343 (60.0) | 63 (65.6) | 1.28 (0.76–2.16) | 0.346 |
  Sometimes | 68 (11.9) | 10 (10.4) | 1.05 (0.47–2.35) | 0.903 |
  Never | 161 (28.1) | 23 (24.0) | 1.00 |  |
Snacking after dinner | Â | Â | Â | Â |
  Yes | 276 (47.8) | 56 (57.1) | 1.44 (0.93–2.23) | 0.100 |
  No | 302 (52.2) | 42 (42.9) | 1.00 |  |
Skipping breakfast | Â | Â | Â | Â |
  No | 548 (93.4) | 91 (91.9) | 1.00 |  |
  Yes | 39 (6.6) | 8 (8.1) | 1.33 (0.60–2.98) | 0.485 |
Wakeup time | Â | Â | Â | Â |
  Before 6:30 | 318 (55.8) | 45 (46.4) | 1.00 |  |
  6:30–6:59 | 90 (15.8) | 17 (17.5) | 1.36 (0.74–2.51) | 0.329 |
  After 7:00 | 162 (28.4) | 35 (36.1) | 1.62 (1.00–2.64) | 0.052 |
Bedtime | Â | Â | Â | Â |
  Before 22:00 | 36 (6.7) | 9 (9.5) | 1.00 |  |
  22:00–22:59 | 262 (48.4) | 46 (48.4) | 0.73 (0.33–1.63) | 0.445 |
  After 23:00 | 243 (44.9) | 40 (42.1) | 0.72 (0.32–1.63) | 0.435 |
Hours of sleep | Â | Â | Â | Â |
   < 8 | 176 (32.8) | 22 (23.4) | 1.00 |  |
  8–9 | 288 (53.7) | 54 (57.4) | 1.44 (0.85–2.46) | 0.179 |
  9+ | 72 (13.4) | 18 (19.1) | 1.85 (0.93–3.67) | 0.081 |