Erratum to: A randomized double-blind multi-center trial of hydrogen water for Parkinson's disease: protocol and baseline characteristics.

Erratum

After publication of the original article [1], it came to the authors’ attention that there was an error in the number of male and female participants. The correct number is 90 male and 88 female, not 89 male and 89 female as originally reported.

This error was present in the Methods section of the abstract and in Table 1.

Table 1

The baseline characteristics of the study participants

	Mean	Std. Deviation
Age	64.2	9.2
Disease duration	6.8	4.5
Sex (male/female) n	90	88
Wearing off (+/−) n	58	120
Dyskinesia (+/−) n	42	136
Levodopa mg	344.1	202.8
Levodopa (+/−) n	154	24
Dopamine agonist levodopa equivalent dose (mg) [12]	166.3	121.1
Total levodopa equivalent dose (mg) [12]a	592.0	317.6
Unified Parkinson’s Disease Rating Scale
Part I	0.7	1.2
Part II	5.6	3.9
Part III	15.7	8.4
Part IV	1.7	2.2
Total	23.7	11.8
Modified Hoehn and Yahr stage	2.1	0.6
Parkinson’s disease Questionnaire-39
Mobility	10.4	9.1
Activities of daily living	5.2	5.1
Emotional well-being	6.0	4.4
Stigma	3.2	2.8
Social support	1.4	1.9
Cognitions	4.0	3.0
Communication	1.7	2.2
Body discomfort	2.5	2.6
Total	34.4	24.2

anot including istradefylline and zonisamide