Psychological stress impact neurotrophic factor levels in patients with androgenetic alopecia and correlated with disease progression

Table 2 Baseline hair growth parameters in non-stress and stress groups, mean ± SD

Hair growth parameters	Non-stress group (n = 30)	Stress group (n = 90)	t-value	P value
Mean hair diameter (μm)	59.81 ± 6.40	50.047 ± 7.36	6.492	0.000
Hair density (hairs/cm²)	105.24 ± 21.38	93.11 ± 28.69	2.124	0.036
Hair follicle count (per 1 cm²)	60.14 ± 10.89	56.47 ± 15.83	1.416	0.161
Terminal/vellus hair ratio	7.16 ± 0.61	7.25 ± 0.72	0.649	0.519