Industrial medicine and surgery . occupations or in some otherposition less hazardous. There have been twenty recurrences amongthose cases kept under observation and in all but three of these thedisease has again been arrested. This is a far lower recurrence ratethan is usually found in this disease, thus demonstrating the value ofhealth supervision. The use of short vacations when threateningsymptoms developed prevented many of these employees from break-ing down. Twenty-nine out of the forty-four third stage or advanced caseswere found during the first two years of this work. Ten of the deat
Industrial medicine and surgery . occupations or in some otherposition less hazardous. There have been twenty recurrences amongthose cases kept under observation and in all but three of these thedisease has again been arrested. This is a far lower recurrence ratethan is usually found in this disease, thus demonstrating the value ofhealth supervision. The use of short vacations when threateningsymptoms developed prevented many of these employees from break-ing down. Twenty-nine out of the forty-four third stage or advanced caseswere found during the first two years of this work. Ten of the deaths *Since their discharge from treatment. 452 INDUSTRIAL MEDICINE AND SURGERY occurred during the first two years the remaining twenty deaths werescattered through the last seven years. (See Fig. 62.) These two facts substantiate the claim that physical examination ofemployees enables the discovery of tuberculous cases in the earlierstages, thereby reducing the death rate, and shortening the time oftreatment necessary for a Fig. 62.—Reduction in number of cases of tuberculosis found and in the death rateas number of employees examined increases. 1, Per cent, of employees examined fromtotal number. 2, Per cent, of tuberculous employees found among number , Per cent, of deaths among those found tuberculous. The age periods at which these tuberculous cases were found wereas follows: Table 15 Age Per cent, of cases 15-20 20-25 25-30 30-35 40-45 45-50 50 or over While the tuberculosis rate decreased markedly after the age of 35,yet the discovery of this disease among the applicants and newemployees resulted in a very noticeable reduction in the incidenceamong the older force. For example in 1909 there were only fivehundred ten employees who had worked at the plant for five yearsor more, but 33 per cent, of our tuberculous employees were foundamong these. Six years later, in 1914, there were two thousand THE TUBERCULOUS
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