TABLE 1.

Season-specific influenza vaccination coverage estimates among enrollees in the IBM MarketScan Multi-State Medicaid database with and without SCD, overall and by patient age and basis of Medicaid eligibility for influenza seasons 2009–2010 through 2014–2015

	2009–2010		2010–2011		2011–2012		2012–2013		2013–2014		2014–2015
	SCD (%)	Non-SCD (%)	SCD (%)	Non-SCD (%)	SCD (%)	Non-SCD (%)	SCD (%)	Non-SCD (%)	SCD (%)	Non-SCD (%)	SCD (%)	Non-SCD (%)
Total	28.4	20.7	24.5	18.2	30.8	18.8	29.1	21.1	33.6	22.0	32.2	20.4
Age
0–4 years	46.8	35.5	38.9	30.8	52.7	32.0	48.0	34.5	52.6	35.2	46.6	31.0
5–9 years	42.1	26.4	34.1	21.6	44.9	22.6	42.6	26.5	48.2	27.8	47.2	25.6
10–14 years	35.4	20.0	27.9	17.3	42.4	18.7	41.0	22.2	44.1	24.1	41.6	22.6
15–19 years	29.9	13.1	26.4	11.8	30.5	12.6	30.3	14.6	38.0	15.9	36.0	14.2
20–24 years	19.0	8.3	16.5	7.0	18.2	6.8	18.3	7.3	22.8	7.6	23.2	6.4
25–29 years	17.6	8.8	16.0	7.6	17.4	7.4	16.6	7.7	18.1	7.6	17.6	7.1
30–34 years	14.5	8.8	14.3	8.4	17.2	8.0	14.6	8.5	19.0	8.6	17.9	8.1
35–39 years	17.9	10.2	16.2	9.3	17.8	9.4	13.4	9.7	19.4	9.9	16.8	9.4
40–64 years	16.5	13.4	17.1	13.2	18.0	13.2	18.5	13.9	21.5	14.5	21.3	14.8
Basis of eligibility
Disability	27.1	13.7	22.5	13.5	29.8	14.1	27.6	15.2	32.2	16.5	30.9	16.0
Other	31.2	22.6	30.4	19.6	34.1	20.4	33.3	23.1	37.5	24.5	34.1	21.8

Note: SCD: Enrollees in the MarketScan Multi-State Medicaid database with three or more codes for SCD in a 5-year period. Non-SCD: Enrollees in the MarketScan Multi-State Medicaid database that did not meet the criteria for SCD. Eligibility for inclusion determined per season based on continuous enrollment 12 months before and 12 months after the start of the influenza season.

Abbreviation: SCD, sickle cell disease.