Table 2.
Risk Ratios for Out‐of‐Hospital Cardiac Arrests on Grand Sumo Tournaments Days Compared With Control Days in the Overall and Subgroups
| Group | Total No. of Events | Event on 855 Tournament Days (n=17 200) | Event on 2797 Control Days (n=54 682) |
|---|---|---|---|
| Overall | 71 882 | ||
| No. of events per day | 20.1 | 19.6 | |
| Risk ratio (95% CI) | 1.09 (1.04–1.16) | 1 | |
| P value | 0.001 | ||
| Males | 42 132 | ||
| No. of events per day | 11.8 | 11.5 | |
| Risk ratio (95% CI) | 1.09 (1.02–1.17) | 1 | |
| P value | 0.011 | ||
| Females | 29 750 | ||
| No. of events per day | 8.4 | 8.1 | |
| Risk ratio (95% CI) | 1.11 (1.03–1.20) | 1 | |
| P value | 0.008 | ||
| 18 to 64 years of age | 15 841 | ||
| No. of events per day | 4.4 | 4.3 | |
| Risk ratio (95% CI) | 1.08 (0.97–1.19) | 1 | |
| P value | 0.168 | ||
| 65 to 74 years of age | 13 710 | ||
| No. of events per day | 3.8 | 3.7 | |
| Risk ratio (95% CI) | 1.02 (0.91–1.14) | 1 | |
| P value | 0.726 | ||
| 75 to 110 years of age | 42 331 | ||
| No. of events per day | 12.0 | 11.5 | |
| Risk ratio (95% CI) | 1.13 (1.06–1.21) | 1 | |
| P value | <0.001 |
Risk ratio was adjusted for year, week, time elapsed since the start of the study, temperature, barometric pressure, site of sumo tournament, and match days. CI indicates confidence interval.