Table 3.

Risk Ratios for Out‐of‐Hospital Cardiac Arrests on Grand Sumo Tournaments Days Compared With Control Days by Cardiac Arrest Onset Time in the Various Age Groups

Hours	Overall (N=71 882)	18 to 74 y (n=29 551)	75 to 110 y (n=42 331)
	Risk Ratio (95% CI) P Value	Risk Ratio (95% CI) P Value	Risk Ratio (95% CI) P Value
0 to 1	0.89 (0.66–1.21) 0.46	0.79 (0.49–1.27) 0.33	1.02 (0.69–1.50) 0.93
2 to 3	0.89 (0.64–1.22) 0.46	0.66 (0.39–1.11) 0.12	1.10 (0.72–1.68) 0.65
4 to 5	1.08 (0.82–1.42) 0.60	1.06 (0.68–1.65) 0.80	1.03 (0.71–1.49) 0.87
6 to 7	1.08 (0.88–1.31) 0.48	0.98 (0.71–1.36) 0.92	1.17 (0.90–1.52) 0.24
8 to 9	1.12 (0.93–1.34) 0.24	1.13 (0.84–1.51) 0.41	1.15 (0.90–1.46) 0.26
10 to 11	0.90 (0.73–1.12) 0.35	0.94 (0.69–1.30) 0.72	0.90 (0.68–1.20) 0.48
12 to 13	1.18 (0.95–1.47) 0.14	1.02 (0.73–1.42) 0.91	1.34 (1.00–1.80) 0.05
14 to 15	1.02 (0.81–1.28) 0.87	0.97 (0.68–1.37) 0.85	1.10 (0.81–1.49) 0.55
16 to 17	0.96 (0.77–1.20) 0.72	0.93 (0.66–1.30) 0.66	1.01 (0.75–1.37) 0.92
18 to 19	1.08 (0.88–1.33) 0.45	1.05 (0.75–1.48) 0.78	1.18 (0.90–1.54) 0.22
20 to 21	1.18 (0.95–1.47) 0.14	0.78 (0.55–1.12) 0.18	1.58 (1.19–2.10) 0.00
22 to 23	0.85 (0.66–1.09) 0.20	0.84 (0.56–1.26) 0.41	0.89 (0.64–1.25) 0.51

Risk ratios were adjusted for year, week, time elapsed since the start of the study, temperature, barometric pressure, site of sumo tournament, and match days.