Carbon Monoxide Headquarters

Chronic CO Poisoning:

Lumio Chronic Carbon Monoxide Study (Cont.):

The Duration of Chronic CO Exposure of Symptomatic Patients in the Study.

Duration (Years) Number of Patients Percent

Under 1 4 1.5

1 - 2 23 8.7

2 - 3 13 4.9

3 - 4 16 6.1

5 - 6 83 31.6

6 - 7 91 34.6

Over 7 10 3.9

......... Total = 263 100.0

The Frequency of Acute CO Poisonings.

Frequency Number of Patients Percent

Never 106 40.3

Once 81 30.8

Twice 42 16.0

Three Times 10 3.8

More than 3 Times 24 9.1

......... Total = 263 100.0

Time when Patients Noted Hearing Impairment for that Subset of Patients who Complained of Hearing Loss.

Time Number of Patients Percent

Under 1/2 Year 30 25.0

1/2 - 1 Year 41 34.2

1 - 2 Year 32 26.7

Over 2 Years 17 14.1

......... Total = 120 100.0

From: Lumio, J.S. (1948) Hearing deficiencies caused by carbon monoxide (generator gas). Acta Otolaryngol., Suppl. 71, 1-112.

...... last changed 03/14/02

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Duration (Years)	Number of Patients	Percent

Under 1	4	1.5
1 - 2	23	8.7
2 - 3	13	4.9
3 - 4	16	6.1
5 - 6	83	31.6
6 - 7	91	34.6
Over 7	10	3.9

......... Total =	263	100.0

Frequency	Number of Patients	Percent

Never	106	40.3
Once	81	30.8
Twice	42	16.0
Three Times	10	3.8
More than 3 Times	24	9.1

......... Total =	263	100.0

Time	Number of Patients	Percent

Under 1/2 Year	30	25.0
1/2 - 1 Year	41	34.2
1 - 2 Year	32	26.7
Over 2 Years	17	14.1

......... Total =	120	100.0