Table 2.

Unadjusted and Adjusted Odds Ratio of Lot Number Accuracy on Key Explanatory Variables

	ORa (99% CI)
	Unadjusted	Adjusted
Data Entry Method
2D Barcode Scanned	1.48 (1.34 – 1.64)	1.75 (1.57 – 1.96)
Traditional Entry	1.00 [Reference]	1.00 [Reference]
Scan Log Typeb
Installed Scan Log	1.06 (0.95 – 1.18)	1.14 (0.42 – 3.10)
Native Scan Log	1.00 [Reference]	1.00 [Reference]
Manufacturer
Manufacturer A	1.91 (1.69 – 2.15)	2.94 (2.57 – 3.36)
Manufacturer B	1.00 [Reference]	1.00 [Reference]
Manufacturer C	0.60 (0.54 – 0.66)	0.48 (0.42 – 0.54)
Other Manufacturers	1.41 (1.23–1.62)	2.34 (2.01–2.72)
Month Administered
July 2014	1.00 [Reference]	1.00 [Reference]
August 2014	0.94 (0.83 – 1.06)	0.93 (0.82 – 1.06)
September 2014	1.66 (1.47 – 1.88)	1.41 (1.24 – 1.61)
October 2014	1.39 (1.25 – 1.56)	1.09 (0.96 – 1.23)
November 2014	1.23 (1.10 – 1.39)	1.03 (0.91 – 1.17)
December 2014	1.17 (1.04 – 1.32)	1.07 (0.95 – 1.22)
January 2015	1.08 (0.96 – 1.21)	1.00 (0.88 – 1.13)
Facility Vaccine Volumec
High	0.61 (0.57 – 0.65)	0.59 (0.29 – 1.18)
Low	1.00 [Reference]	1.00 [Reference]
Facility Funding Type
Publicly Funded	1.11 (0.94 – 1.30)	0.30 (0.05 – 1.66)
Privately Funded	1.00 [Reference]	1.00 [Reference]
Facility Specialty
Pediatrics Specialty	0.90 (0.84 – 0.96)	1.17 (0.53 – 2.62)
All Other Specialties	1.00 [Reference]	1.00 [Reference]
Vaccine Type
Flu Vaccine	1.87 (1.75 – 2.01)	4.07 (3.77 – 4.40)
Other Vaccine Types	1.00 [Reference]	1.00 [Reference]

^aOR is odds ratio.

^bIndicator for records that were scanned. Tracking software was installed or native to the EMR.

^cHigh volume >400 vaccines administered/week; low ≤400/week.