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Table 1 Characteristics of study population for the full (n=890,394) and sampled cohorts

From: Fitting parametric random effects models in very large data sets with application to VHA national data

Analysis variable Full cohort (n=890,394) 25% (n=225,000) 10% (n=90,000) 5% (n=45,000) 1% (n=9,000) REMR (n=890,394)
Non-Hispanic White: % (n) 62 (547,645) 61 (138,470) 62 (55,489) 62 (27,853) 62 (5,529) 62 (547,645)
Non-Hispanic Black: % (n) 12 (107,935) 12 (27,317) 12 (10,941) 12 (5,406) 12 (1,097) 12 (107,935)
Hispanic: % (n) 14 (123,558) 14 (31,062) 14 (12,481) 14 (6,148) 14 (1,285) 13 (123,558)
Other: % (n) 12 (111,256) 13 (28,151) 12 (11,089) 12 (5,593) 12 (1,089) 13 (111,256)
Male: % (n) 98 (869,508) 98 (219,708) 98 (87,921) 98 (43,947) 98 (8,794) 98 (869,508)
Married: % (n) 65 (574,307) 64 (145,060) 65 (58,222) 64 (29,002) 65 (5,853) 64 (574,307)
Disability (mean % & sd) 12 (0.03) 12 (0.06) 12 (0.09) 12 (0.13) 13 (0.30) 12 (0.63)
Northeast 12 (103,056) 12 (25,994) 11 (10,274) 12 (5,272) 12 (1,074) - (103,056)
Mid-Atlantic 23 (201,058) 22 (50,579) 23 (20,328) 23 (10,230) 23 (2,000) - (201,058)
Midwest 21 (184,348) 21 (46,940) 21 (18,658) 21 (9,368) 20 (1,827) - (184,348)
South 30 (265,450) 30 (66,988) 30 (26,759) 29 (13,189) 30 (2,707) - (265,450)
West 15 (136,482) 15 (34,499) 16 (13,981) 15 (6,941) 16 (1,392) - (136,482)
Urban Residence 62 (548,786) 61 (138,339) 61 (55,324) 62 (27,701) 61 (5,513) 61 (548,786)
Rural Residence 38 (341,608) 39 (85,612) 39 (34,676) 38 (17,299) 39 (3,487) 39 (341,608)
Mean HbA1c (mean % & sd) 7.4 (0.002) 7.4 (0.003) 7.4 (0.005) 7.4 (0.007) 7.4 (0.016) 7.5 (0.030)
Mean HbA1c<8%: % (n) 73 (703,596) 73 (177,751) 73 (71,195) 73 (34,498) 71 (7,112) 70 (703,596)
No Comorbidities 57 (507,320) 57 (128,326) 57 (51,178) 57 (25,506) 57 (5,143) 57 (507,320)
1 Comorbidity 28 (248,898) 28 (62,961) 28 (25,309) 28 (12,655) 27 (2,456) 28 (248,898)
2 Comorbidities 11 (95,542) 11 (23,998) 11 (9,706) 11 (4,898) 11 (1,022) 11 (95,542)
3+ Comorbidities 4 (38,634) 4 (9,715) 4 (3,807) 4 (1,941) 4 (379) 4 (38,634)
  1. Not applicable due to sampling by VISN or aggregation by VISN.