. 2017 Nov 20;7(11):e017784. doi: 10.1136/bmjopen-2017-017784

Table 5.

Comparison of date of death confirmed by Out-of-Hospital Cardiac Arrest Outcomes (OHCAO) and Office for National Statistics (ONS) data

		ONS confirmed survival status			Total (n, % total 3120 cases)
		Dead	Alive	No	Total (n, % total 3120 cases)
OHCAO project date of death provided	Yes	1114	7	57	1178 (37.8%)
OHCAO project date of death provided	No	1137	248	557	1942 (62.2%)
Total (n, % total 3120 cases)		2251 (72.1%)	255 (8.2%)	614* (19.7%)	3120 (100%)

*Includes seven matched cases where data not provided by NHS Digital (one patient lost to follow-up (reason unknown), six patient registration of type 2 opt-out with NHS Digital).