Table 1:

Incidence rates of acute care use^* for vaccine-preventable illnesses among Medicaid beneficiaries with prevalent SLE (N=45,654)

	Number of patients	Person-years	Incidence Rate per 1,000 person-years (95% CI)	Percent of total events occurring among unvaccinated patients**
Composite of vaccine-preventable illnesses +	1290	196,171	6.6 (6.2–6.9)	93%
Herpes zoster	476#	199,434	2.4 (2.2–2.6)	97%
Influenza	397	199,725	2.0 (1.8–2.2)	95%++
Pneumococcal disease	310	200,351	1.5 (1.4–1.7)	NR
Hepatitis B	86	201,241	0.4 (0.3–0.5)	100%
High-grade cervical dysplasia/Cervical cancer	58	190,309	0.3 (0.2–0.4)	100%
Meningococcal disease	25	201,434	0.1 (0.1–0.2)	100%

^*Acute care use includes emergency department visits or hospitalizations

⁺61 SLE patients had more than one vaccine-preventable illness but were included once in the composite measure; there were 1,352 ED visits or hospitalizations among 1,290 patients

^**Vaccine claims during the 12-month baseline period

^#386 cases occurred in individuals <50 (IR 2.5, 95% CI 2.3–2.8) and 90 cases in individuals ≥50 (IR 1.9, 95% CI 1.6–2.4). In both groups, 97% of cases were among those unvaccinated.

⁺⁺Updating influenza vaccine yearly, 92% had events without vaccine claims in the preceding vaccination season

NR= Cell sizes >0 and <11 are not reported; percent of events among patients who received pneumococcal vaccine is <11