Table 1.

Baseline characteristics of study population, by First Nations status

Non-First Nations (n=140,709)First Nations (n=6574)P Value
Age (yr), mean (SD)61.7 (15.0)53.2 (13.9)<0.001
Female sex, n (%)66,270 (47.1)3782 (57.5)<0.001
eGFR (ml/min per 1.73 m2), mean (SD)74.8 (22.6)87.9 (27.6)<0.001
eGFR stage (ml/min per 1.73 m2), n (%)<0.001
 ≥60 106,946 (76.0)5710 (86.9)
 <60 33,763 (24.0)864 (13.1)
Hypertension, n (%)88,987 (63.2)3399 (51.7)<0.001
Charlson comorbidity index, median (IQR)1 (1–2)1 (1–2)<0.001
Location of residence, n (%)<0.001
 Urban116,484 (82.8)2869 (43.6)
 Rural23,459 (16.7)3692 (56.2)
 Unknown766 (0.5)13 (0.2)
Income quintiles, n (%)<0.001
 1 (lowest)29,908 (21.3)3415 (52.0)
 230,519 (21.7)928 (14.1)
 327,510 (19.6)754 (11.5)
 426,097 (18.6)521 (7.9)
 5 (highest)23,017 (16.4)539 (8.2)
 Unknown3658 (2.6)417 (6.3)
Prior specialist care (nephrology or internal medicine), n (%)38,450 (27.3)1165 (17.7)<0.001
  • eGFR, estimated GFR; IQR, interquartile range.