Negative N-Protein IgG in the last 9 to 12 monthsa Positive N-Protein IgG in the last 9 to 12 monthsb Negative N-Protein IgG in the last 3 to 7 monthsc Positive N-Protein IgG in the last 3 to 7 monthsd P value
39 55 32 144
IgG level ≥ 50 AU/ml No. (%) 34 (97.1) 55 (100.0) 21 (75.0) 144 (100.0) p<0.001 between c and a,b,d
median level [range], AU/ml
20,685 [13,-40,000] 40,000 [67- 40,000] 230 [1- 40,000] 27313 [210-40,000]
p<0.001 between c and a,b,d