Table 4.

Correlation between serum PF4 and covariates

Covariate	Method	Correlation	N	P-value
Age	Pearson	−0.090	133	0.30
Class	Spearman	0.108	133	0.22
Gender	Spearman	−0.071	133	0.42
Platelet Count*	Pearson	0.196	124	0.02
Stage	Spearman	0.125	133	0.15
Treatment†	Spearman	0.056	130	0.52

^*Nine subjects with missing platelet count were not included

^†Three subjects with missing treatment information were not included