Table 2 Estimated rate ratios and 95 % confidence intervals for the cohort effects on motorcycle mortality rate per 100,000 people in the United States, 1975–2014
From: Mortality from motorcycle crashes: the baby-boomer cohort effect
Birth cohort | Rate ratio | 95 % Confidence interval |
|---|---|---|
1895–1899 | 0.66 | 0.29, 1.50 |
1900–1904 | 0.95 | 0.51, 1.75 |
1905–1909 | 0.97 | 0.58, 1.64 |
1910–1914 | 0.69 | 0.43, 1.11 |
1915–1919 | 0.91 | 0.59, 1.42 |
1920–1924 | 0.92 | 0.60, 1.39 |
1925–1929 | 0.78 | 0.53, 1.17 |
1930–1934 | 1.00 | Reference |
1935–1939 | 1.15 | 0.78, 1.69 |
1940–1944 | 1.27 | 0.86, 1.87 |
1945–1949 | 1.43 | 0.97, 2.10 |
1950–1954 | 1.47 | 1.00, 2.16 |
1955–1959 | 1.48* | 1.01, 2.18 |
1960–1964 | 1.47* | 1.00, 2.17 |
1965–1969 | 1.17 | 0.79, 1.75 |
1970–1974 | 0.96 | 0.63, 1.46 |
1975–1979 | 0.69 | 0.45, 1.08 |
1980–1984 | 0.46* | 0.29, 0.74 |
1985–1989 | 0.39* | 0.23, 0.65 |
1990–1994 | 0.28* | 0.15, 0.51 |
1995–1999 | 0.17* | 0.07, 0.38 |