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Table 1 Sources of attrition in wave 2 overall and stratified by raceb

From: Modelling attrition and nonparticipation in a longitudinal study of prostate cancer

Sources of Attrition N (%) AAa (%) EAa (%) p-valuec,d
Deceased 118 (26) 59 (50) 59 (50) 1.000
Frail 23 (5) 13 (57) 10 (44) 0.532
Lost to Follow-Up 87 (19) 69 (79) 18 (21) < 0.001
Passive Refusal 29 (6) 22 (76) 7 (24) 0.005
Active Refusale 206 (45) 103 (50) 103 (50) 1.000
Total 463 (100) 266 (58) 197 (43) 0.001
  1. aAA african american, EA european american
  2. bTotal participants of wave 2 = 764 men (62%)
  3. cp-values were obtained from binomial exact tests separately for each reason to assess racial differences
  4. dSignificant p-values at Type I error 0.05 are bolded
  5. eIncludes 46 men who refused further contact at the time of wave 1