Table 1:
Unadjusted Mean Cluster Weight by Demographic and Clinical Characteristics
| Cluster 1: Acute Complications |
p-value | Cluster 2: Chronic Disease |
p-value | Cluster 3: Substance Abuse |
p-value | |
|---|---|---|---|---|---|---|
|
| ||||||
| Overall population, Mean (SE) | 0.63 (0.01) | -- | 0.62 (0.01) | -- | 0.21 (0.01) | -- |
|
| ||||||
| Age, Mean (SE) | <0.001* | <0.001* | <0.001* | |||
| 50–54 | 0.80 (0.03) | 0.31 (0.02) | 0.30 (0.02) | |||
| 55–64 | 0.72 (0.02) | 0.49 (0.02) | 0.28 (0.02) | |||
| 65–74 | 0.59 (0.03) | 0.74 (0.03) | 0.17 (0.02) | |||
| 75–84 | 0.44 (0.03) | 0.95 (0.03) | 0.09 (0.01) | |||
| 85+ | 0.33 (0.03) | 0.86 (0.04) | 0.03 (0.01) | |||
|
| ||||||
| Sex, Mean (SE) | <0.001* | 0.376 | <0.001* | |||
| Female | 0.51 (0.02) | 0.62 (0.02) | 0.13 (0.01) | |||
| Male | 0.69 (0.02) | 0.61 (0.02) | 0.24 (0.01) | |||
|
| ||||||
| Race, Mean (SE) | 0.013 | 0.422 | <0.001* | |||
| White | 0.64 (0.02) | 0.63 (0.01) | 0.19 (0.01) | |||
| Black | 0.64 (0.04) | 0.55 (0.03) | 0.35 (0.03) | |||
| Asian/Pacific Islander | 0.57 (0.07) | 0.59 (0.07) | 0.14 (0.04) | |||
| Hispanic | 0.52 (0.05) | 0.62 (0.05) | 0.15 (0.02) | |||
| Native American/Other | 0.42 (0.08) | 0.57 (0.11) | 0.31 (0.10) | |||
|
| ||||||
| Marital Status, Mean (SE) | 0.022 | 0.006 | <0.001* | |||
| Single | 0.64 (0.04) | 0.51 (0.04) | 0.31 (0.03) | |||
| Married | 0.66 (0.02) | 0.62 (0.02) | 0.17 (0.01) | |||
| Divorced/Separated/Widowed | 0.57 (0.02) | 0.65 (0.02) | 0.23 (0.01) | |||
|
| ||||||
| Education, Mean (SE) | 0.121 | 0.822 | <0.001* | |||
| Less than High School | 0.64 (0.03) | 0.64 (0.03) | 0.25 (0.02) | |||
| High School Diploma | 0.63 (0.02) | 0.62 (0.02) | 0.22 (0.02) | |||
| Some College/Associates | 0.66 (0.03) | 0.59 (0.03) | 0.21 (0.02) | |||
| Bachelor’s Degree | 0.58 (0.04) | 0.63 (0.03) | 0.17 (0.02) | |||
| Graduate School | 0.63 (0.04) | 0.63 (0.03) | 0.13 (0.02) | |||
|
| ||||||
| Primary Acute Payor, Mean (SE) | <0.001* | <0.001* | <0.001* | |||
| Medicare | 0.52 (0.02) | 0.84 (0.02) | 0.14 (0.01) | |||
| Medicaid | 0.75 (0.04) | 0.49 (0.04) | 0.42 (0.04) | |||
| Workers Compensation | 0.70 (0.07) | 0.39 (0.05) | 0.20 (0.04) | |||
| Private Insurance/HMO/PPO | 0.72 (0.02) | 0.48 (0.02) | 0.23 (0.01) | |||
| No-fault Insurance/Auto | 0.54 (0.05) | 0.49 (0.04) | 0.13 (0.03) | |||
| Other | 0.73 (0.06) | 0.39 (0.04) | 0.30 (0.04) | |||
|
| ||||||
| GCS Total, Mean (SE) | <0.001* | <0.001* | <0.001* | |||
| 3–8 | 0.85 (0.05) | 0.45 (0.03) | 0.25 (0.03) | |||
| 9–12 | 0.68 (0.05) | 0.51 (0.04) | 0.32 (0.03) | |||
| 13–15 | 0.48 (0.02) | 0.73 (0.02) | 0.18 (0.01) | |||
|
| ||||||
| Mechanism of Injury, Mean (SE) | <0.001* | <0.001* | <0.001* | |||
| Vehicle | 0.78 (0.03) | 0.43 (0.02) | 0.19 (0.01) | |||
| Assault/Violence | 0.65 (0.06) | 0.39 (0.05) | 0.47 (0.05) | |||
| Fall | 0.56 (0.02) | 0.76 (0.02) | 0.21 (0.01) | |||
| Pedestrian | 0.52 (0.05) | 0.41 (0.04) | 0.12 (0.02) | |||
| Other | 0.75 (0.09) | 0.53 (0.08) | 0.11 (0.05) | |||
|
| ||||||
| Cranial Surgery, Mean (SE) | <0.001* | 0.034 | 0.288 | |||
| Craniotomy/Craniectomy/Both | 0.76 (0.03) | 0.65 (0.03) | 0.22 (0.02) | |||
| Neither Craniotomy/Craniectomy | 0.59 (0.01) | 0.61 (0.01) | 0.21 (0.01) | |||
|
| ||||||
|
Primary Person Living with Pre-injury, Mean
(SE) |
0.003* | 0.031* | 0.015* | |||
| Alone | 0.56 (0.02) | 0.66 (0.02) | 0.25 (0.02) | |||
| Spouse/SO/parent/sibling/child/roommate | 0.66 (0.02) | 0.60 (0.01) | 0.19 (0.01) | |||
| Other patients, residents, personal care | 0.39 (0.06) | 0.77 (0.11) | 0.15 (0.05) | |||
| attendant, or not otherwise classified | ||||||
*
statistical significance indicated by p-values <0.001
£
The Mann Whitney U test (2 group) or Wilcoxon Rank Sum Test (3+ groups) was used
Abbreviations: GCS, Glasgow Coma Scale; SO, significant other