Table 1.

Baseline comorbidities in stone formers identified by ICD-9 codes from 1984 to 2008 (group 1) and control participants in Olmsted County, Minnesota

ComorbidityStone Formers (n=6926), n (%)Controls (n=24,620), n (%)P
CKD383 (5.5)811 (3.3)<0.001
Hypertension1501 (21.7)4848 (19.7)<0.001
Diabetes mellitus766 (11.1)2048 (8.3)<0.001
Obesity1655 (23.9)5044 (20.5)<0.001
Dyslipidemia1647 (23.8)5389 (21.9)<0.001
Gout219 (3.2)648 (2.6)0.02
  • ICD-9, International Classification of Diseases, Ninth Revision.