Variability in Skin Prick Test Results Performed by Multiple Operators Depends on the Device Used

Table 2 Variability of Skin Prick Test Measurements by Device and Location

Device	Arm	Back
Stallergenes Lancet random error	0.43 (0.28-0.76)	0.47 (0.30-0.82)
Quintip random error	1.01 (0.66-1.74)	0.62 (0.40-1.08)
Feather Lancet random error	1.02 (0.66-1.77)	1.23 (0.83-2.18)
Greer Pick random error	3.55 (2.37-5.91)	2.27 (1.50-3.84)
All devices
Between-tester variability	0.16 (0.06-1.20)	0.26 (0.10-1.50)
Between-receiver variability	0.55 (0.19-5.31)	0.18 (0.06-2.48)

Estimates of variability (and 95% confidence intervals) from a single multilevel/random effects model allowing for variability between testers and receivers and random measurement error. Larger numbers reflect greater levels of variability.

ISSN: 1939-4551