Table 1.

Mean age at vaccination and prevalence of on-time vaccination among children in Tianjin, China, summer 2011

	MCV dose 1 a		MCV dose 2 b		MCV dose 3 c
	Mean age in months at vaccination (SD)	Number vaccinated on-time (%)	Mean age in months at vaccination (SD)	Number vaccinated on-time (%)	Mean age in years at vaccination (SD)	Number vaccinated on-time (%)	Total number
Overall	8.46 (0.78)	288 (87.5%)	20.54 (2.94)	246 (93.1%)	5.04 (0.14)	52 (76.5%)	329
Sex
Female	8.37 (0.54)	156 (90.2%)	20.68 (2.86)	131 (94.2%)	5.05 (0.17)	30 (73.2%)	173
Male	8.57 (0.97)	132 (84.6%)	20.37 (3.02)	115 (91.3%)	5.03 (0.03)	22 (81.5%)	156
District d
Binhai	8.82 (0.91)	30 (63.8%)	22.48 (5.40)	24 (68.6%)	5.07 (0.09)	3 (27.3%)	47
Hebei	8.38 (0.70)	239 (92.6%)	20.13 (1.82)	207 (98.6%)	5.04 (0.09)	46 (92.0%)	258
Ninghe	8.84 (1.48)	9 (75.0%)	20.56 (2.14)	9 (81.8%)	5.01 (0.00)	1 (33.3%)	12
Wuqing	8.55 (0.60)	10 (83.3%)	23.36 (7.07)	6 (66.7%)	5.07 (0.57)	2 (50.0%)	12
Birth year
2005	8.59 (0.97)	37 (90.2%)	22.00 (4.71)	36 (87.8%)	5.07 (0.15)	30 (73.2%)	41
2006	8.42 (0.37)	50 (94.3%)	21.76 (3.30)	49 (92.5%)	4.99 (0.11)	22 (81.5%)	53
2007	8.50 (0.59)	48 (85.7%)	20.61 (1.49)	53 (94.6%)	-	-	56
2008	8.35 (0.66)	50 (94.3%)	20.10 (1.86)	50 (94.3%)	-	-	53
2009	8.59 (1.12)	47 (77.1%)	18.83 (1.45)	54 (93.1%)	-	-	61
2010	8.37 (0.75)	56 (86.2%)	17.96 (0.03)	4 (100.0%)	-	-	65

MCV, measles-containing vaccine.

SD, standard deviation.

^a329 children were eligible for MCV1. Children 8 months of age or older were included. On-time vaccination is defined as administration before the infant is 9 months of age.

^b265 children were eligible for MCV2. Children 18 months of age or older were included. On-time vaccination is defined as administration before the child is 2 years of age.

^c68 children were eligible for MCV3. Children 5 years of age or older were included. On-time vaccination is defined as administration before the child is 5 years 1 month of age.

^dOnly one clinic per district was selected.