Table 1.
Patient Demographics and Characteristics
| Characteristics | Total Participants (n = 158) | Weaning Success (n = 112) | Weaning Failure (n = 46) | p a |
|---|---|---|---|---|
| Age, yr | 60.0 (53.0–70.0) | 59.0 (51.0–69.8) | 63.5 (56.8–71.0) | 0.034 |
| Gender, female/male (%female) | 55/103 (34.8%) | 42/70 (37.5%) | 13/33 (28.3%) | 0.268 |
| BMI | 28.6 (25.0–33.8) | 28.8 (25.6–34.2) | 27.7 (24.0–32.3) | 0.271 |
| Race | ||||
| Hispanic | 74 (46.8%) | 50 (44.6%) | 24 (52.2%) | 0.389 |
| Black | 36 (22.8%) | 26 (23.2%) | 10 (21.7%) | 0.841 |
| White non-Hispanic | 39 (24.7%) | 29 (25.9%) | 10 (21.7%) | 0.582 |
| Others | 9 (5.7%) | 7 (6.3%) | 2 (4.3%) | 0.805 |
| Acute Physiology and Chronic Health Evaluation II | 12.0 (8.0–17.0) | 10.0 (7.0–16.0) | 15 (11.8–18.3) | 0.001 |
| Do not resuscitate | 14 (8.9%) | 6 (5.4%) | 8 (17.4%) | 0.027 |
| Comorbidities | ||||
| Hypertension | 104 (65.8%) | 73 (65.2%) | 31 (67.4%) | 0.790 |
| Diabetes mellitus | 84 (53.2%) | 54 (48.2%) | 30 (65.2%) | 0.052 |
| Obesity (BMI ≥ 30) | 62 (39.2%) | 46 (41.1%) | 16 (34.8%) | 0.462 |
| Pulmonary disease | 29 (18.2%) | 23 (20.5%) | 6 (13.0%) | 0.269 |
| Cardiac disease | 27 (17.2%) | 16 (14.3%) | 11 (23.9%) | 0.151 |
| Malignancy | 10 (6.3%) | 7 (6.3%) | 3 (6.5%) | 0.949 |
| Hemodialysis | 6 (3.0%) | 3 (2.7%) | 3 (6.5%) | 0.358 |
| Clinical course in the acute care hospital of origin | ||||
| LOS, d | 41.0 (33.0–54.0) | 40.5 (32.0–51.0) | 43.0 (33.0–63.0) | 0.127 |
| MV, d | 35.0 (27.0–46.0) | 35.0 (27.3–45.8) | 35.5 (26.0–54.8) | 0.351 |
| LTACHs admission functional status | ||||
| Basic mobility (AM-PAC t Scale score) | 16.6 (16.6–19.4) | 16.6 (16.6–22.6) | 16.7 (16.7–16.7) | 0.0001 |
| Self-care functioning (AM-PAC t Scale score) | 17.1 (17.1–23.5) | 17.1 (17.1–23.3) | 17.1 (17.1–17.1) | 0.0003 |
| Course in the LTACHsb | ||||
| MV, d | 11.0 (5.8–26.0) | 9.5 (5.0–18.0) | 32 (6.8–63.5) | 0.0003 |
| LOS, d | 36.5 (26.3–60.0) | 39.0 (28.0–59.0) | 33.5 (8.8–73.0) | 0.118 |
| Mortality | 15 (9.6%) | 2 (1.8%) | 13 (29.5%) | < 0.0001 |
AM-PAC = Activity Measure for Post-Acute Care, BMI = body mass index, LOS = length of stay, LTACH = long-term acute care hospital, MV = mechanical ventilation.
aComparisons weaning success vs weaning failure only, Mann-Whitney U test was used for continuous variables, and χ2 test or Fisher exact test was used for categorical variables.
bData refers to patients discharged at the time of final assessment (Total n = 156, weaning successes n = 112, weaning failure n = 44).
Data are n (%) or median (interquartile range).