Table 1.

Prebiopsy characteristics of case and control patients

CharacteristicKidney AA amyloidosis, n=38Complete DataOther Kidney Diagnoses, n=72Complete Data
Agea45±93846±1072
Womena12 (32)3823 (32)72
Racea3872
 White28 (74)52 (72)
 Black5 (13)7 (10)
 Other5 (13)13 (18)
Smoking status3872
 Never4 (11)40 (56)
 Former2 (5)8 (11)
 Current32 (84)24 (33)
Body mass index, kg/m227±83728±668
Past medical history3872
 Diabetes2 (5)13 (18)
 Cirrhosis1 (3)3 (4)
 Rheumatoid arthritis1 (3)1 (1)
 Tuberculosis6 (16)4 (6)
 Inflammatory bowel disease1 (3)2 (3)
 Lupus2 (5)15 (21)
 Sjogren syndrome0 (0)1 (1)
eGFR, ml/min per 1.73 m238±303848±3271
Serum albumin, g/dl1.8±0.8363.0±0.868
Serum HDL cholesterol, mg/dl30±212548±2345
Serum triglycerides, mg/dl210±10125167±13147
HIV4 (11)3614 (22)65
Hepatitis B core antibody5 (26)1911 (28)39
Hepatitis C antibody14 (74)1910 (24)42
Proteinuria, g/d or g/gb12 (5, 15)303 (1, 6)48
Kidney size, cmc12.8±1.63311.3±1.356
  • All values are expressed as mean±SD or number (percentage of nonmissing values), except for urine protein, which is expressed as median (interquartile range).

  • a Matching characteristics.

  • b Urine protein expressed as grams per 24 hours if timed data were available, or g/g from spot collection.

  • c Average of right and left kidney sizes.