Table 2.
Comparison of participants completing the study with those lost to follow-up
| Characteristic | Completed 30 d of Follow-Up |
Completed 90 d of Follow-Up |
||||
|---|---|---|---|---|---|---|
| Yes (n = 107) | No (n = 13) | P Value | Yes (n = 103) | No (n = 17) | P Value | |
| Age, yr, median | 48 | 50.6 | 0.4 | 48 | 51 | 0.4 |
| Female sex | 79 (74%) | 9 (69%) | 0.7 | 75 (73% | 13 (77%) | >0.99 |
| African American | 97 (91%) | 85 | 0.6 | 95 (92%) | 13 (76%) | 0.07 |
| Ever-smoker* | 73 (68%) | 10 (77%) | 0.8 | 69 (67%) | 14 (82%) | 0.4 |
| Insufficient vision† | 15 (14%) | 3 (23%) | 0.4 | 13 (13%) | 5 (29%) | 0.1 |
| Inadequate health literacy‡ | 21 (23%) | 2 (20%) | >0.99 | 21 (23%) | 2 (17%) | >0.99 |
| Hospitalized in the last 12 mo, ≥1 time, excluding study period | 71 (66%) | 8 (62%) | 0.8 | 69 (67%) | 10 (59%) | 0.6 |
| No provider§ | 17 (16%) | 4 (31%) | 0.2 | 18 (17%) | 3 (18%) | >0.99 |
| Near-fatal respiratory event, ≥1 ICU admission or intubation for asthma or COPD | 54 (50%) | 5 (38%) | 0.6 | 55 (53%) | 4 (24%) | 0.03 |
| Site, hospital 1 vs. hospital 2 | 91 (85%) | 9 (69%) | 0.2 | 86 (83%) | 14 (82%) | >0.99 |
| Asthma vs. COPD | 76 (71%) | 6 (46%) | 0.1 | 73 (71%) | 9 (53%) | 0.3 |
Definition of abbreviations: COPD = chronic obstructive pulmonary disease; ICU = intensive care unit.
All data are presented as number (%) unless otherwise indicated. Baseline completers, n = 120; 30-day completers, n = 107 (lost to follow-up, n = 13); 90-day completers, n = 103 (lost to follow-up, n = 17).
Ever-smoker was defined as more than 100 lifetime cigarettes versus never-smoker.
Insufficient vision was defined as worse than 20/50 vision in both eyes using the Snellen chart.
Health literacy was assessed in 102 participants with brief intervention (n = 50) or treat-to-goal intervention (n = 52). The remaining subjects had insufficient vision to complete the assessment (n = 18). Less than adequate health literacy was defined as a score of less than 23 of 36 on the Short Test of Functional Health Literacy (24).
Did not identify a general physician, specialist physician (pulmonologist or allergist), or nurse practitioner as providing care for participants’ asthma or COPD.