Table 1.
Characteristics of workers in the study cohort and workers with ever and never exposure to McIntyre Powder (MP), described by median and interquartile range. [N=number of workers; IQR=interquartile range].
| Study cohort (N=36 826) | MP-exposed | MP-unexposed | |||
|---|---|---|---|---|---|
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| Self-reports (N=9 548) |
Historical records (N=13 827) |
Self-reports (N=27 278) |
Historical records (N=22 999) |
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| Median (IQR) | Median (IQR) | Median (IQR) | Median (IQR) | Median (IQR) | |
| Year of birth | 1938 (1927–1949) | 1932 (1923–1941) | 1937 (1927–1949) | 1941 (1929–1951) | 1939 (1927–1949) |
| Year of first hire | 1963 (1952–1971) | 1955 (1948–1964) | 1958 (1951–1970) | 1966 (1954–1973) | 1965 (1953–1972) |
| Duration of employment (years) | 11 (6–18) | 13 (7–23) | 10 (6–19) | 10 (6–17) | 11 (6–18) |
| Years of follow-up | 23 (11–26) | 18 (8–26) | 21 (10–26) | 25 (12–26) | 24 (12–26) |
| Age at end of follow-up (years) | 73 (65–81) | 77 (68–83) | 73 (65–81) | 72 (64–80) | 73 (65–81) |