Clinical Features of Dermatomyositis/Polymyositis with Anti-MDA5 Antibody Positivity

Table 6

K-M survival analysis in the positive and negative groups.

	n	1-year OS (%)	χ ^2	P value	Median OS time (months)
					Estimated value	95% CI
						Lower limit	Upper limit
Overall	64	94.3			267.916	244.914	290.917
Anti-MDA5 antibody			4.503	0.034
Negative	46	97.4			284.641	270.404	298.878
Positive	18	76.2			31.833	25.647	38.020