. 2022 Feb 1;12(2):e055640. doi: 10.1136/bmjopen-2021-055640

Table 3.

Phasic comparisons of indices for dispatcher-assisted and bystander-initiated resuscitation efforts between 2011 and 2010/2012 in tsunami-affected prefectures

Indices related to DA-CPR and BCPR	Impact phase		Unadjusted OR (95% CI) with 2010/2012 as a reference	Postimpact phase		Unadjusted OR (95% CI) with 2010/2012 as a reference
Indices related to DA-CPR and BCPR	2011	2010/2012	Unadjusted OR (95% CI) with 2010/2012 as a reference	2011	2010/2012	Unadjusted OR (95% CI) with 2010/2012 as a reference
DA-CPR sensitivity, no/total (%)	433/776 (55.8)	835/1391 (60.0)	0.84 (0.70 to 1.00)	598/1062 (56.3)	1,240/2224 (55.8)	1.02 (0.88 to 1.19)
Bystander’s compliance to DA-CPR, no/total (%)	269/433 (62.1)	255/835 (69.5)	0.72 (0.57 to 0.92)	393/598 (65.7)	838/1240 (67.6)	0.92 (0.75 to 1.13)
Bystander’s own performance of BCPR, no/total (%)	106/449 (23.6)	174/730 (23.8)	0.99 (0.72 to 1.07)	117/581 (20.1)	230/1214 (19.0)	1.08 (0.84 to 1.39)

Bold figures indicate significant results.

BCPR, bystander cardiopulmonary resuscitation; DA-CPR, dispatcher-assisted cardiopulmonary resuscitation.;