Table 1. Annual rates of diarrhoea-related hospitalizations in children younger than 5 years, Mexico, 2003–2011.

Socioeconomic categorya	Age (months)	Vaccine coverageb (%)	No. of DR hospitalizationsc		Rate reductiond % (95%CI)
			2003–2006	2008–2011
High	≤ 11	100	823	400	51 (48–54)
	12–23	100	2050	1049	49 (45–53)
	24–59	88	792	698	12 (4–19)
	0–59	93	1001	597	40 (38–43)
Intermediate	≤ 11	84	580	302	48 (44–51)
	12–23	100	2200	1113	49 (45–53)
	24–59	79	850	638	25 (18–31)
	0–59	86	834	497	41 (38–43)
Low	≤ 11	85	668	401	40 (36–44)
	12–23	100	2703	1531	43 (39–47)
	24–59	51	1077	893	17 (10–23)
	0–59	71	1033	705	32 (29–34)
All	≤ 11	89	684	358	48 (46–50)
	12–23	100	2301	1195	48 (46–50)
	24–59	69	888	733	18 (13–21)
	0–59	82	945	590	38 (36–39)

CI, confidence interval; DR, diarrhoea-related; RVA, species A rotavirus.

^a The socioeconomic status of the state in which the reporting hospital was located, based on the human development index of the state for the year 2007.

^b RVA vaccine coverage with two doses, as recorded in 2010. As the Ministry of Health may deliver vaccine to a region larger than that planned, the recorded coverage, which is based on the size of the planned target population, can exceed 100%.

^c Per 10 000 all-cause admissions. Prevaccine and postvaccine rates – shown for 2003–2006 and 2008–2011, respectively – are based on the sums of the monthly median numbers of diarrhoea-related hospitalizations and all-cause admissions at 346 health ministry hospitals. To account for differences in vaccine coverage by age group and postvaccine year, the postvaccine values for children aged ≤ 11, 12–23 and 24–59 months were based on the number of diarrhoea-related hospitalizations over 2008–2011, 2009–2011 and 2010–2011, respectively.

^d Rate reduction in the postvaccine period with respect to the prevaccine period.