TABLE 3.
Proportion or mean and standard deviation for demographic characteristics, BMI, and depression by subtype (class) of night eating as identified by latent class analysis, and comparing all nonnight eaters (total NNE groups) with all night eaters (total NE groups)
| Mean Age (years) |
Female (%) | Non-Hispanic White (%) |
Non-Hispanic Black (%) |
Hispanic (%) | BMI | DSM-III Dysthymia (%) |
DSM-III Major Depression (%) |
|
|---|---|---|---|---|---|---|---|---|
| Depressed late night eaters (n = 330) | 27.3 ± 7.2 | 46.3 | 71.6 | 16.9 | 10.2 | 24.6 ± 6.1 | 18.6 | 32.9 |
| Depressed evening eaters (n = 296) | 28.0 ± 7.2 | 52.1 | 75.2 | 14.8 | 8.1 | 25.4 ± 6.4 | 23 | 28.1 |
| Nondepressed late night eaters (n = 864) | 26.2 ± 7.0 | 36.8 | 68.7 | 17.3 | 10.5 | 24.9 ± 5.8 | 2.5 | 1.1 |
| Nondepressed evening eaters (n = 578) | 27.2 ± 7.1 | 48.6 | 67.7 | 14.3 | 13.7 | 24.5 ± 5.5 | 0.5 | 0.1 |
| Total NE (n = 2,068) | 26.9 ± 7.1 | 43.8 | 69.8 | 16 | 11 | 24.8 ± 5.9 | 7.4 | 9.8 |
| Total NNE (n = 6,182) | 27.7 ± 7.2 | 53.5 | 71.7 | 11.9 | 12.5 | 25.4 ± 6.0 | 5.7 | 8.2 |
| NNTa:NE vs. NNE | +44.4* | +10.3** | +53 | −24.2** | +66.8 | +18.1* | −57.3 | −64.1 |
a
NNT = ±1 indicates perfect discrimination between NEs and NNEs. Positive NNT means that NNE group has response greater than NE group; negative that NE group has response greater than NNE group. As a “rule of thumb” in epidemiological studies, ∣NNT∣ ≤ 10 indicates strong, 10 < ∣NNT∣ ≤ 20 moderate, and ∣NNT∣ > 20 weak association.
*
p < .01
**
p < .001 (no differences were significant at 0.01 ≤ p < 0.05).