Table 1

 Monthly frequencies in suicide in Swiss cantons/regions, 1901–20 and 1969–2000

Canton/region1901–19201969–2000
Numberχ2 (2 df)Peak-low ratioLower CIUpper CINumberχ2 (2 df)Peak-low ratioLower CIUpper CI
†Including Glarus. *p<0.05; **p<0.01; ***p<0.001. Edwards’ test χ2 values, peak-low ratios, and 95% confidence intervals.
Zurich275663.6***1.571.401.7684000.71.031.001.09
Bern285463.2***1.531.381.7172536.1*1.081.021.16
Lucerne4093.61.191.011.40185014.4***1.291.131.47
Central CH25427.9***2.811.794.3914499.0*1.231.061.43
Fribourg33625.3***2.271.593.25143211.8**1.301.121.50
Solothurn4376.1*1.401.071.8415835.31.181.021.36
Basle City4920.71.121.001.4317850.61.051.001.20
Basle Country3385.31.431.051.9414854.61.171.011.35
Schaffhausen2367.2*1.651.132.435270.31.071.001.37
Appenzell37911.3**1.641.222.235743.01.231.001.55
St Gallen†113813.8***1.371.161.6229689.9**1.181.061.31
Graubünden42820.4***1.891.412.55111911.5**1.331.131.58
Aargau90039.0***1.831.502.2531584.81.121.011.32
Thurgau62215.4***1.571.251.9913312.41.131.001.31
Ticino3653.21.311.001.7611746.4*1.231.051.45
Vaud219531.6***1.411.251.5942734.11.091.001.19
Valais23517.7***2.261.483.4714313.31.151.001.33
Neuchatel77825.9***1.701.372.1012864.21.181.001.38
Geneva9353.61.191.001.4326196.5*1.151.031.29