Estimated value (km) | 95% confidence interval (km) | p value | ||
---|---|---|---|---|
Female (reference: male) | 0.68 | 0.61–0.75 | 0.0000 | |
Registration year (reference: 1978) | 1980 | 1.19 | 1.02–1.40 | 0.0320 |
1982 | 1.06 | 0.91–1.25 | 0.4370 | |
1984 | 0.87 | 0.75–1.02 | 0.0860 | |
1986 | 0.98 | 0.84–1.15 | 0.8340 | |
1988 | 0.77 | 0.66–0.90 | 0.0010 | |
1990 | 0.74 | 0.63–0.86 | 0.0000 | |
1992 | 0.73 | 0.62–0.85 | 0.0000 |