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Table 3 Summary of the annual percent changes (APCs) and joinpoints (JPs) for trends in age-standardized suicide rates by sex for England and Wales (1966-1992) and Taiwan (1987-2007)

From: Suicide epidemics: the impact of newly emerging methods on overall suicide rates - a time trends study

  Segment 1   Segment 2   Segment 3
  APC (95% CI) JP 1 (95% CI) APC (95% CI) JP 2 (95% CI) APC (95% CI)
Overall suicide
England and Wales (2 join points for males and one join point for females)
Male -5.4 (-6.8, -3.9) 1972 (1971, 1975) 2.2 (1.4, 2.9) 1983 (1979, 1986) 0.0 (-0.8, 0.7)
Female -5.4 (-7.2, -3.5) 1972 (1969, 1977) 0.6 (-0.8, 2.0) 1981 (1979, 1985) -6.2 (-7.1, -5.2)
Taiwan (1 join point for males and females)
Male -8.5 (-15.0, -1.5) 1992 (1989, 1994) 6.8 (5.7, 7.9)   
Female -11.2 (-15.0, -7.2) 1992 (1991, 1994) 5.1 (4.4, 5.8)   
Gassing suicide
England and Wales (2 join points for males and one join point for females)
Male -16.1 (-18.3, -13.9) 1974 (1973, 1976) 9.8 (7.0, 12.7) 1984 (1979, 1988) 4.4 (2.3, 6.7)
Female -27.9 (-29.6, -26.2) 1975 (1974, 1976) 12.0 (7.5, 16.6) 1985 (1982, 1989) 1.3 (-3.1, 5.8)
Taiwan (1 join point for males*; join point regression not performed for females due to zero values for some of the years)
Male* 0.01 (-0.003, 0.03) 1999 (1998, 2001) 1.2 (1.0, 1.4)   
Female -     
Non-gassing suicide
England and Wales (1 join point for males and females)
Male 1.0 (0.6, 1.4) 1982 (1980, 1984) -2.0 (-2.7, -1.3)   
Female 0.3 (-0.1, 0.8) 1981 (1980, 1983) -7.2 (-8.1, -6.4)   
Taiwan (2 join points for males and females)
Male -8.0 (-11.7, -4.2) 1993 (1989, 1995) 12.7 (0.7, 26.1) 1997 (1995, 2005) 1.6 (0.2, 3.0)
Female -10.4 (-12.5, -8.2) 1993 (1991, 1994) 10.7 (3.0, 18.9) 1997 (1996, 1999) 1.1 (0.2, 2.0)
  1. *Annual change in rates per 100,000, not annual percent change, shown.