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Table 4 Characteristics of patients retained compared to all patients enrolled

From: Strategies for recruitment and retention of underrepresented populations with chronic obstructive pulmonary disease for a clinical trial

  Enrolled
(n = 192)
Completed study
(n = 158)
Did not complete study (n = 34) P-value*
At enrollment
 Age, in years, mean (sd) 61.3 (7.6) 61.3 (7.5) 61.1 (8.5) p = .92
 Male, % (n/N) 65.5 (126/192) 63.9% (101/158) 73.5% (25/34) p = .29
Preferred Language
 English, % (n/N) 87.4% (167/191) 86.6% (136/157) 91.2% (31/34) p = .47
 Spanish, % (n/N) 9.4% (18/191) 10.2% (16/157) 5.9% (2/34) p = .44
 Other, % (n/N) 3.1% (6/191) 3.2% (5/157) 2.9% (1/34) p = .94
Race
 African-American, % (n/N) 56.7% (109/192) 55.7% (88/158) 61.8% (21/34) p = .52
 White, % (n/N) 21.3% (41/192) 20.9% (33/158) 23.5% (8/34) p = .73
 Asian, % (n/N) 3.6% (7/192) 4.4% (7/158) 0.0% (0/34) p = .21
 Other, % (n/N) 16.1% (31/192) 19.0% (30/158) 14.7% (5/34) p = .56
 Ethnicity- Latino/Hispanic, % (n/N) 16.7% (32/192) 17.7% (28/158) 11.8% (4/34) p = .40
 Substance use, % (n/N) 28.6% (55/192) 26.6% (42/158) 38.2% (13/34) p = .17
 PHQ score ≥ 15, % (n/N) 15.7% (30/192) 16.6% (26/158) 11.8% (4/34) p = .49
 < High school education, % (n/N) 31.9% (61/191) 31.9% (50/157) 32.4% (11/34) p = .95
 Limited health literacy**, % (n/N) 37.2% (71/191) 39.5% (62/157) 26.5% (9/34) p = .15
 FEV1 < 50% predicted 38.8% (59/152) 38.0% (49/129) 43.5% (10/23) p = .62
 Gold category D, % (n/N) 46.3% (88/190) 45.2% (71/157) 51.5% (17/33) p = .51
During study period
 >  1 hospitalization, % (n/N) 25.0% (48/192) 22.2% (35/158) 38.2% (13/34) p < 0.05
 >  1 hospitalization for COPD, % (n/N) 18.2% (35/192) 17.7% (28/158) 20.6% (7/34) p = .69
 Uses oxygen at home, % (n/N) 18.3% (35/191) 14.7% (23/157) 35.3% (12/34) p < 0.005
  1. *For completed study vs did not complete study
  2. **Needs someone to help read medial information at least a little of the time