Table 1.
Means and sd for Melatonin Suppression (%) Within the Pre/Midpuberty and Late/Postpuberty Groups Across Morning and Evening Light Conditions (15, 150, and 500 lux)
| Light Group | Puberty Group | AUC |
30-Minute Light |
60-Minute Light |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 15 lux | 150 lux | 500 lux | 15 lux | 150 lux | 500 lux | 15 lux | 150 lux | 500 lux | ||
| Evening light | Pre/mid M (sd) | 9.2a (20.5) | 26.0a (17.7) | 36.9a (11.4) | 9.48a (21.5) | 25.2c (19.3) | 43.0a (18.4) | 11.5a (23.9) | 47.3b (20.7) | 60.7a (12.4) |
| Late/post M (sd) | −5.3 (17.7) | 12.5 (17.3) | 23.9 (21.7) | −6.6 (24.5) | 12.9 (19.8) | 25.6 (21.9) | −8.9 (30.9) | 20.9 (33.9) | 39.5 (31.8) | |
| Morning light | Pre/mid M (sd) | 10.0 (18.6) | 36.3 (14.9) | 35.0 (11.8) | 12.5 (18.2) | 41.8 (15.0) | 43.3c (12.5) | 9.78 (26.6) | 61.6 (14.4) | 62.9 (14.8) |
| Late/post M (sd) | 10.9 (16.7) | 27.1 (18.1) | 27.7 (15.5) | 11.4 (21.0) | 31.4 (23.9) | 30.7 (20.8) | 16.0 (23.0) | 53.0 (17.7) | 57.6 (13.3) | |
a
P < .05;
b
P < .01;
c
P < .10 compared to the late/postpuberty group.