Table 6 Spline regression analysis, Duodenal bleeding ulcers
Males | Females | |||
|---|---|---|---|---|
Year | Coef. | 95% Conf. interval | Coef. | 95% Conf. interval |
1975 | -0.23 | -0.52 0.06 | -0.23 | -0.53 0.08 |
1980 | 0.01 | -0.03 0.06 | 0.05 | -0.004 0.10 |
1985 | 0.04 | -0.004 0.08 | 0.06 | 0.02 0.11 |
1990 | 0.05 | 0.003 0.09 | 0.06 | 0.01 0.11 |
1995 | -0.10 | -0.14 -0.05 | -0.07 | -0.11 -0.02 |
2000 | -0.09 | -0.12 -0.05 | -0.09 | -0.13 -0.06 |