Table 1. Serum NDKA levels in the screening cohort according to demographic and clinical characteristics.

Characteristics	N	Median (pg/mL)	IQR (pg/mL)	P
Age (years)
≤49	177	55.88	45.91–67.76	0.259a
50–59	172	58.80	46.64–70.32
≥60	162	60.25	47.86–70.95
Gender
Male	210	58.80	47.15–71.14	0.354b
Female	301	58.31	46.57–68.36
Familial risk
1 FDR ≥ 60 years	340	58.80	46.88–69.72	0.985a
1 FDR < 60 years	117	57.23	46.38–69.44
≥2 FDR	54	56.15	45.02–74.58

IQR: interquartile range; ^aKruskal-Wallis test, ^bMann-Whitney U test. FDR: first-degree relative.