Table II.

Adjusted regression analyses for change in hair density and hair caliber compared with deficient, nonsupplemented patients

Patient supplementation categories	Change in hair density, hairs/cm2 (95% CI)	P value	Change in hair caliber, μm (95% CI)	P value
Nonsupplemented patients with evidence of initial deficiency	Reference	–	Reference	–
Patients supplemented without evidence of initial deficiency	−10.28 (−31.17, 10.61)	.33	1.69 (−8.18, 11.56)	.73
Patients supplemented for deficiency with nonnormalized laboratory values at follow-up	3.17 (−11.39, 17.72)	.67	0.91 (−5.98, 7.79)	.79
Patients supplemented for deficiency with normalized laboratory values at follow-up	5.04 (−8.88, 18.96)	.48	4.04 (−2.54, 10.62)	.23

Regression adjusted for deficiency at baseline, initial trichometric measurements, days to follow-up, number of ordered medications, number of supplements being taken, and number of micronutrients tested for initial visit.