Table 2.

The summary results of all 23 studies

Results	Primary outcomes				Subgroup analyses
	28 days	90 days	ICU	Hospital	Low risk	High risk	VP	VP analogs	AT-II	Refractory shock	Septic shock
RR	0.92	0.95	0.96	1.08	0.91	0.97	0.95	0.91	0.85	0.84	0.94
95% CI lower bound	0.86	0.88	0.77	0.92	0.84	0.83	0.85	0.81	0.69	0.70	0.87
95% CI upper bound	0.99	1.04	1.20	1.27	0.98	1.15	1.06	1.02	1.06	0.998	1.01
P value	0.02*	0.26	0.73	0.35	0.02*	0.75	0.33	0.11	0.14	0.048*	0.11

ICU intensive care unit, VP vasopressin, AT-II angiotensin II, RR relative risk, CI confidence interval, *P < 0.05