Anthraco-silicosis among hard coal miners / from the Office of Industrial Hygiene and Sanitation, R.R. Sayers ; prepared by direction of the Surgeon General.

  • United States Public Health Service
Date:
1936
Catalogue details

Licence: Public Domain Mark

Credit: Anthraco-silicosis among hard coal miners / from the Office of Industrial Hygiene and Sanitation, R.R. Sayers ; prepared by direction of the Surgeon General. Source: Wellcome Collection.

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    tht TaBLE 50.— Mortality from all respiratory diseases except influenza and ie a among the fathers of anthracite coal workers interviewed —— Number of deaths Including Death rate those allo- Pursuits of the fathers of anthracite workers interviewed ! per 100,000 cated from men Reported | the group in by thesons| which the cause of death was unknown to the son 2 1. Industries other than anthracite mining____-...._.--...---_--- 96 5 10 2. Nonmining occupations in anthracite coal industry......-_---- 172 13 14 3S) MiinersianG mine tabOrerss ..24 ose sse eke ue ewe ee Po 463 48 50 4Rocka drillers injanthracitesmines) 222. 5-5.2- sou esac cece cece 1382 15 15 1 See footnote 1 of table 46. 2 Deaths for which the cause was unknown to the son were apportioned to this disease group in accord- ance with the percentage of such deaths among white male decedents age 25 and over in the registration States of 1920 during the year 1925. 5. MORTALITY ACCORDING TO LENGTH OF SERVICE On account of the difficulty of obtaining exact information from the sons as to the length of time that the father had been employed in different occupations, mortality rates are presented for only two periods of service, viz: 20 to 29 years, and 30 or more years. Death rates were computed according to these periods of service for the age group 45 to 64 because it afforded the largest amount of data on per- sons with the longer service. One may see from table 51 that miners and mine laborers experienced a higher rate of mortality from disease after 30 years’ service than did the men in the nonmining occupations of the industry exclusive of rock drillers. This difference in mortality was 3.4 times the probable error of the difference. Stated in another way, the odds were 45 to 1 against chance fluctuation incident to small numbers as the cause of the indicated difference in mortality. Although these odds are not great enough to eliminate the possibility of chance as a factor, it appears that 30 or more years of work at the coal face is likely to involve greater risk of dying prematurely from disease than does the same length of employment in other under- ground occupations, rock drilling excepted, or in work at the surface. TaBLE 51.—Mortality from sickness and nonindustrial accidents according to time spent in the anthracite mining industry by men at ages 45 to 64 Death rate per 1,000 men Number of deaths |_| Number of years of life Indus- Non- | Indus- Miners | mining} tries |Miners|mining| tries |Miners|mining| tries and j|occupa-| other and | occupa-| other and |occupa-| other their | tionsin| than their | tionsin! than their | tionsin| than help- | anthra-| anthra-| help- | anthra-| anthra-| help- | anthra-| anthra- Non- | Indus- Non- Length of service ers 1 cite cite ers 1 cite cite ers 1 cite cite mining!/mining! mining!|mining! mining!|mining! All lengths of service.-...- 24.9 15. 5 19.1 94 48 78 | 3,780] 3,099 4,077 20 toreOryearse ee ik 20.1 A eek ee 25 ALOT | eee Scr 1, 242 OLE eee eee 30 years and over______--_-- 30. 0 ALS De [ene 57 PAO gal ene ee 1, 901 WAG ois cera 1 See footnote 1 of table 46.
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