Table 1.
Study characteristics of DISC girls with early, average, or late Menarche
| Overall Mean(SD) n Range |
Early (≤11.75 years) Mean (SD) n |
Average (11.76– 13.74 years) Mean (SD) n |
Late (≥13.75 years) Mean (SD) n |
Between group p-value |
Overall p-value |
|
|---|---|---|---|---|---|---|
| Birth weight (g) | 3411.33 (496.39) 278 |
3298.47 (496.89) 40 |
3411.39 (479.61) 186 |
3497.90 (545.38) 52 |
0.19† 0.27‡ 0.06§ |
0.16 |
| Birth length (cm) | 51.12 (2.80) 242 40.64–57.15 |
50.76 (3.00) 36 |
51.06 (2.68) 158 |
51.59 (3.01) 48 |
0.57† 0.25‡ 0.18§ |
0.36 |
| Gestational age (weeks) | 38.72 (2.28) 193 24.0–43.0 |
38.93 (2.25) 27 |
38.87 (2.03) 122 |
38.18 (2.86) 44 |
0.91† 0.09‡ 0.18§ |
0.20 |
| BMI-for-age percentile at visit prior to menarche* |
28.13 (28.52) 273 0.89–98.49 |
71.87 (19.70) 40 |
59.04 (27.46) 182 |
44.11 (32.25) 51 |
<0.01† <0.001‡ <0.0001§ |
<0.0001 |
| METs at visit prior to menarche |
277.5 (43.90) 265 22.50– 467.25 |
277.64 (52.06) 40 |
265.38 (41.21) 176 |
286.26 (45.92) 49 |
<0.76† <0.17‡ <0.44§ |
0.39 |
| Mean mother’s age at Menarche (Year) |
12.91 (1.34) 163 10.0–19.0 |
12.21 (1.32) 24 |
12.94 (1.28) 108 |
13.35 (1.40) 31 |
0.02† 0.12‡ <0.01§ |
0.006 |
| Race | ||||||
| White | 236 | 24 | 167 | 45 | ||
| Black | 15 | 3 | 10 | 2 | ||
| Asian | 11 | 7 | 4 | 0 | ||
| Not reported | 16 | 6 | 5 | 5 |
SD = standard deviation
n of each cell varies due to missing data
*
mean age at last visit prior to menarche = 11.75 years, SD = 1.31, range 8.34 –16.30 years
†
comparing early to average
‡
comparing average to late
§
comparing early to late