Table 1

Epidemiologic analysis of OHCA cases caused by anaphylaxis

VariableIncidence rate
(number/1000 OHCA cases)
Statistics
(Yates’ χ2)
Region in Japan (north to south)<0.01
 Hokkaido0.23 (9/38,832)
 Tohoku0.32 (24/75,668)
 Kanto0.20 (58/290,619)
 Chubu0.36 (57/158,185)
 Kinki0.34 (51/148,042)
 Chugoku0.43 (21/49,032)
 Shikoku1.64 (46/28,030)
 Kyushu0.65 (59/90,649)
Month (season)<0.01
 July–September (Summer)0.78 (136/174,336)
 Other0.22 (158/704,721)
Time of day (emergency call)<0.01
 Business hours (9:00 –16:59)0.43 (169/397,001)
 Other0.26 (125/482,056)
Weekday0.80
 Weekend0.33 (84/256,620)
 Other0.34 (210/622,437)
Age<0.01
 Elderly (≥70 y)0.24 (152/631,947)
 Other0.57 (142/247,110)
Sex<0.01
 Male0.39 (197/502,059)
 Female0.26 (97/376,998)
  • OHCA, out-of-hospital cardiac arrest.