Table 5. Results of binary logistic regression analyses, dependent variable  =  hearing improvement > 10 dB, independent variables  =  GPIIIa receptor density and fibrinogen, n = 55^#.

	GPIIIa receptor density above mean		GPIIIa receptor density below mean		ORs (95%-CI) for GPIIIa receptor density within different strata of fibrinogen
	N with/without hearing improvement	OR (95% CI)	N with/without hearing improvement	OR (95% CI)
Fibrinogen above mean	2/11	1.0	5/12	1.57 (0.81 – 3.03); p = 0.178	1.57 (0.81 – 3.03); p = 0.178
Fibrinogen below mean	5/17	1.44 (0.76 – 2.70); p = 0.260	9/15	2.62 (0.96 – 7.15); p = 0.060	1.82 (0.83 – 4.01); p = 0.135

Measure of effect modification on additive scale: relative excess risk due to interaction, RERI (95% CI)  =  0.61 (−1.11 – 2.34)

Measure of effect modification on multiplicative scale: ratio of ORs (95% CI) = 1.16 (0.61– 2.20), p = 0.650

ORs are adjusted for smoking and vertigo, # = 4 datasets missing due to missing covariates.