Table 3.
Factors affecting hair growth rates for children.
| N | Mean (SD) | ANOVA | P-value | |
|---|---|---|---|---|
| Agea | 0.0073 | |||
| <1 year | 9 | 287.9 (60.7) | ||
| 1 year old | 30 | 322.5 (57.1) | ||
| 2 years old | 47 | 343.6 (47.1) | ||
| 3 years old | 61 | 345.1 (47.2) | ||
| 4 years old | 85 | 343.5 (46.8) | ||
| 5 years old | 34 | 343.3 (39.7) | ||
| Sex | 0.71 | |||
| Female | 122 | 338.4 (47.2) | ||
| Male | 144 | 340.7 (50.4) | ||
| Raceb | 0.016 | |||
| Asian | 67 | 355.6 (50.3) | ||
| White | 119 | 332.1 (48.5) | ||
| Mixed | 44 | 338.4 (48.7) | ||
| Other | 36 | 336.0 (42.2) | ||
| Heightc | 0.0025 | |||
| Bottom tertile | 89 | 325.4 (54.3) | ||
| Middle tertile | 89 | 344.2 (43.8) | ||
| Top tertile | 88 | 349.3 (45.0) | ||
| Age-Adjusted Heightd | 0.040 | |||
| Bottom tertile | 85 | 329.2 (57.4) | ||
| Middle tertile | 94 | 341.5 (37.5) | ||
| Top tertile | 87 | 347.7 (49.3) | ||
| Hair Pigmentatione | 0.0019 | |||
| Light | 74 | 325.3 (50) | ||
| Medium | 105 | 339.1 (43) | ||
| Dark | 87 | 352.4 (51.6) | ||
| Season | 0.22 | |||
| Winter | 56 | 338.1 (51) | ||
| Spring | 40 | 349.1 (27.6) | ||
| Summer | 29 | 351.3 (36.9) | ||
| Fall | 141 | 335.1 (54.2) |
a
Age: Tukey post hoc tests: <1 year vs. 2-year olds, p = 0.019, <1 year vs. 3-year olds, p = 0.012, <1 year vs. 4-year olds, p = 0.013, <1 year vs. 5-year-olds, p = 0.027.
b
Race: Tukey post hoc tests Asian vs. White race, p = 0.0085.
c
Height: Tukey post hoc tests: bottom vs. middle tertile, p = 0.025, bottom vs. top tertile, p = 0.0030.
d
Age-adjusted height: post hoc tests bottom vs. top tertile, p = 0.034.
e
Hair Pigmentation: Tukey post hoc test light vs. dark pigment hair, p = 0.0012.