Closing the gap in Australian Aboriginal infant immunisation rates -- the development and review of a pre-call strategy

Table 1 Mean and range of the three-monthly percentage of fully immunised children 12–15 months of age, HNELHD and rest of NSW, over three time periods June 2007 to September 2014

Time Period		Percentage HNELHD 12–15 month olds fully immunised			Percentage rest of NSW 12–15 month olds fully immunised			p values for gap^a
Time Period	Fully immunised	Non-Aboriginal	Aboriginal	Gap	Non-Aboriginal	Aboriginal	Gap	p values for gap^a
T1 (Jun 07–Dec 09)	mean	26,232/27,944 (93.9 %)	1,913/2,238 (85.5 %)	8.4 %	206,207/224,803 (91.7 %)	6,191/7,232 (85.6 %)	6.1 %	0.437
T1 (Jun 07–Dec 09)	range^b	93.1–94.5 %	82.3–88.7 %		91.4–92.2 %	83.2–88.2 %
T2 (Mar 10–Dec 12)	mean	28,803/30,824 (93.4 %)	2,408/2,758 (87.2 %)	6.2 %	229,221/251,010 (91.3 %)	7,732/9,020 (85.7 %)	5.6 %	0.060
T2 (Mar 10–Dec 12)	range^b	92.6–94 %	84.4–91.1 %		89.6–91.9 %	83.0–88.2 %
T3 (Mar 13–Sep 14)	mean	16,674/18,063 (92.3 %)	1,901/2,090 (90.9 %)	1.4 %	132,772/147,366 (90.1 %)	85,215/6,037 (6.3 %)	3.8 %	0.752
T3 (Mar 13–Sep 14)	range^b	91.1–93.7 %	88.1–93.6 %		88.8–92.3 %	82.3–90.1 %
p-value				0.0001			0.004

^acalculated via Wald test comparing gradients of each line within time periods
^brange reflects quarterly cohort coverage provided by the Australian Childhood Immunisation Register

ISSN: 1471-2458