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Table 2 Assessing possibility of subcohort effect in accelerated prospective design

From: Recruitment and participant baseline characteristics in the dialysis outcomes in those aged 65 years or older study

   Predialysis (n = 56) Incident (< 1 year) (n = 50) Prevalent (1–3 years) (n = 57) Prevalent (>  3 years) (n = 62) p value
   n % n % n % n %  
Gender
 Male 37 66.1 33 66.0 35 61.4 39 62.9  
 Female 19 33.9 17 34.0 22 38.6 23 37.1 0.94
Age group
 65–69 20 35.7 20 40.0 21 36.8 26 41.9  
 70–74 11 19.6 16 32.0 15 26.3 22 35.5  
 75–79 13 23.2 6 12.0 16 28.1 10 16.1 0.13
 80+ 12 21.4 8 16.0 5 8.8 4 6.5  
Ethnicity (self reported)
 European 30 53.6 19 38.0 23 40.4 24 38.7  
 Māori 10 17.9 10 20.0 18 31.6 12 19.4  
 Pacific 6 10.7 17 34.0 10 17.5 19 30.6 0.06
 Other 10 17.9 4 8.0 6 10.5 7 11.3  
Comorbiditiesa
 Cardiovascular disease 36 64.3 33 66.0 38 66.7 44 71.0 0.88
 Cerebrovascular disease 4 7.1 3 6.0 5 8.8 5 8.1 0.97
 Peripheral vascular disease 13 23.2 7 14.0 11 19.3 14 22.6 0.63
 Diabetes mellitus 27 48.2 29 58.0 32 56.1 32 51.6 0.74
 Respiratory disease 16 28.6 10 20.0 9 15.8 14 22.6 0.43
 cancer (other than skin cancer) 8 14.3 11 22.0 8 14.0 11 17.7 0.67
 Musculoskeletal 18 32.1 14 28.0 14 24.6 22 35.5 0.60
 Other 36 64.3 30 60.0 37 64.9 37 59.7 0.91
Comorbidity count
 0 to 2 24 42.9 23 46.0 29 50.9 28 45.2  
 3 to 6 32 57.1 27 54.0 28 49.1 34 54.8 0.85
Cause of ESKD
 Glomerulonephritis 8 14.3 9 18.0 7 12.3 14 22.6  
 Hypertension 10 17.9 7 14.0 12 21.1 9 14.5  
 Polycystic kidney 2 3.6 1 2.0 4 7.0 5 8.1  
 Diabetes mellitus 20 35.7 22 44.0 27 47.4 23 37.1 0.55
 Other 16 28.6 11 22.0 7 12.3 11 17.7  
  1. amultiple comorbidities possible