TABLE 3—

Baseline (2001–2002 Influenza Season) and Postintervention (2002–2003 Influenza Season) Influenza Vaccine Coverage of Health Care Workers at Long-Term Care Facilities, by Intervention Group: Southern California, 2002–2003

		No. Vaccinated (%)
Group	No. of Health Care Workersa	Baseline	Postintervention	Crude PR (95% CI)	Adjusted PR (95% CI)b
Control group	1517	467 (31)	450 (28)	1.00	1.00
Educational campaign group	821	240 (29)	298 (34)	1.23 (0.87, 1.72)	1.18 (0.93, 1.50)
Vaccine Day group	832	292 (35)	410 (46)	1.66 (1.23, 2.23)	1.41 (1.17, 1.71)
Combined intervention groupc	754	295 (39)	439 (53)	1.93 (1.45, 2.58)	1.45 (1.24, 1.71)

Note. PR = prevalence ratio; CI = confidence interval.

^aHealth care workers whose influenza vaccination status was unknown for the 2001–2002 or 2002–2003 influenza seasons were excluded from the analyses.

^bAdjusted for health care worker baseline vaccination status, facility size (number of licensed beds), and correlated observations.

^c The combined intervention group conducted both the educational campaign intervention and the Vaccine Day intervention.