Table 1.
Characteristic of study population and associations with time to participant contact
| Characteristics | All patients (N=146) |
Hazard Ratio | |||
|---|---|---|---|---|---|
| HR | 95% CI | P-value | |||
| Demographic and socio-economic | |||||
| Age, median (IQR) | 47 | (38-55) | 1.00 | (0.98-1.02) | 0.85 |
| Male, N (%) | 77 | (52.7) | 0.78 | (0.47-1.28) | 0.32 |
| Caucasian, N (%) | 84 | (57.5) | 0.99 | (0.60-1.63) | 0.97 |
| Enrolled from the primary study site, N (%) | 44 | (30.1) | 1.52 | (0.88-2.63) | 0.13 |
| Years of education, median (IQR) | 12 | (11-16) | 1.05 | (0.95-1.15) | 0.35 |
| Employed at last visit, N (%) | 40 | (27.4) | 0.66 | (0.35-1.24) | 0.20 |
| Type of work at last visit, N (%) | |||||
| Physical labor | 17 | (11.6) | 0.50 | (0.18-1.39) | 0.19 |
| Non-physical labor | 23 | (15.8) | 0.79 | (0.37-1.66) | 0.53 |
| Not working or unemployed | 106 | (72.6) | ref | ||
| Health-related limitation in employment at last visit, N (%) | |||||
| Present | 27 | (18.5) | 0.98 | (0.52-1.84) | 0.94 |
| Not working, at all, due to a health-related issue | 44 | (30.1) | 0.72 | (0.39-1.34) | 0.30 |
| Employed with no health-related limitation or otherwise not working |
75 | (51.4) | ref | ||
| Pre-ALI/ARDS Comorbidity | |||||
| Charlson score, median (IQR) | 1 | (0-6) | 1.03 | (0.92-1.16) | 0.58 |
| Drug abuse, N (%) | 48 | (32.8) | 1.30 | (0.77-2.18) | 0.32 |
| Alcohol abuse, N (%) | 31 | (21.2) | 1.02 | (0.56-1.84) | 0.96 |
| Other psychiatric history, N (%) | 40 | (27.3) | 1.19 | (0.70-2.00) | 0.53 |
| Medical status at last follow-up visit | |||||
| Immobility (inability to transfer from bed and/or chair), N (%) | 19 | (13.0) | 1.14 | (0.54-2.38) | 0.73 |
| Hearing impairment (inability to hear TV or radio), N (%)* | 34 | (23.4) | 0.81 | (0.43-1.53) | 0.52 |
| Home oxygen use, N (%) | 15 | (10.2) | 0.82 | (0.33-2.03) | 0.66 |
| Patient-reported chronic dyspnea, N (%)* | 51 | (35.2) | 1.22 | (0.72-2.03) | 0.44 |
| Patient-reported chronic fatigue, N (%)* | 57 | (39.3) | 1.69 | (1.03-2.79) | 0.04 |
| Requires assistance at home, N (%) | 24 | (16.4) | 1.60 | (0.85-2.90) | 0.13 |
| Lives in a health care facility, N (%) | 15 | (10.2) | 0.54 | (0.22-1.36) | 0.19 |
| Research visit history as at last follow-up visit or ever during follow-up | |||||
| Number of contact phone numbers available at last visit, median (IQR) |
3 | (2-6) | 1.10 | (0.98-1.24) | 0.12 |
| Last visit conducted in clinic, N (%) | 52 | (35.6) | 1.43 | (0.87-2.37) | 0.16 |
| Last visit not conducted in clinic due to patient illness/condition, N (%) |
33 | (22.6) | 0.40 | (0.19-0.84) | 0.02 |
| Incomplete data collection at last visit due to patient factors£, N (%) |
43 | (29.4) | 0.65 | (0.37-1.14) | 0.13 |
| Reason for nonattendance at last scheduled visit, N (%)* | |||||
| Medical reason | 29 | (20) | 1.27 | (0.70-2.33) | 0.43 |
| Other (weather, transportation, scheduling, family illness) | 33 | (22.8) | 0.66 | (0.29-1.46) | 0.23 |
| No nonattendance | 83 | (57.2) | ref | ||
| Missed last follow-up visit, N (%) | 29 | (19.9) | 0.47 | (0.22-1.00) | 0.05 |
| Missed last follow-up visit due to personal factor$, N (%) | 15 | (10.3) | 0.44 | (0.16-1.20) | 0.11 |
| Ever missed any follow-up visit, N (%) | 45 | (30.8) | 0.52 | (0.29-0.94) | 0.03 |
| Ever had home visit during follow-up, N (%) | 58 | (39.7) | 0.77 | (0.46-1.29) | 0.32 |
Abbreviations: HR: Hazard ratio, >1 indicates a shorter time to contact with the participant, CI Confidence interval, TV: television
^
Obtained from simple Cox proportional hazards models; hazard ratio (HR) >1 indicates a shorter time to contact with the participant
£
Personal factors include: incarcerated, on ventilator, excessively fatigued, or cognitively, mentally or physically incapable
*
Missing data for 1 patient
$
Personal factors include patient being: incarcerated, not interested, too busy, too stressed, or under influence of drugs or alcohol