Table 1

Characteristics of the 9 carbon monoxide–intoxicated patients

Patient	Age, yr	Sex	Education, no. of yr	Duration of unconsciousness, hr	Initial clinical presentation	Important findings at presentation	Important findings at study enrolment
1	41	Female	12	8	Confusion	Ataxic gait with right lower leg weakness	Parkinsonism, apthathetic, cognitive decline
2	57	Male	12	5	Headache, myalgia	Personality changes	Memory complaints, insomnia, parkinsonism
3	43	Male	9	12	No verbal output with dull response	Apathetic	Cognitive decline
4	41	Female	12	3	Dizziness and headache	Parkinsonism	Unsteady gait, memory complaints
5	26	Female	9	5	Dizziness and headache	Unsteady gait	Personality changes, depression
6	37	Female	16	12	Confusion	Insomnia, gait problem	Cognitive decline
7	24	Female	16	8	Confusion	Unsteady gait	Tremor, leg dystonia
8	63	Male	12	7	Tremor of lower limbs	Memory complaints	Topographic disorientation, parkinsonism
9	41	Male	12	10	Unsteady gait, dizziness, confusion	Memory complaints	Incontinence, depressed mood