Table VI.

Serum ferritin of female ALS patients.

Disease characteristic	Number of subjects	Serum ferritin, ng/ml	P-value
Limb-onset	6	97.71±59.42	0.0080
Bulbar-onset	4	248.08±76.69
Without dysphagia	3	61.63±43.89	0.0357
With dysphagia	7	199.10±87.59
Disease duration ≤12 months	4	113.40±73.93	0.2739
Disease duration >12 months	6	187.50±109.54
ALSFRS-R score <33	6	207.11±93.09	0.0474
ALSFRS-R score ≥33	4	83.98±57.28

ALS, amyotrophic lateral sclerosis; ALSFRS-R, Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised.