TABLE A3.
Associations of baseline, 2-, and 8- week measures with patterns of sample attrition among respondents who completed the baseline assessment
| All |
ED Only |
ED + WK2 Only |
ED + WK8 Only |
ED + WK2 + WK8 Only |
χ2/F- test | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Esta | SE | Esta | SE | Esta | SE | Esta | SE | Esta | SE | ||
| I. Demographics | |||||||||||
| Male (%) | 31.6 | (1.5) | 41.0 | (3.5) | 40.0 | (4.5) | 35.7 | (7.4) | 27.0 | (1.7) | 18.9* |
| Age (%) | 36.2* | ||||||||||
| 50+ | 15.5 | (1.1) | 12.5 | (2.3) | 3.3 | (1.6) | 19.0 | (6.1) | 18.3 | (1.5) | 19.4* |
| 35–49 | 26.2 | (1.4) | 19.0 | (2.8) | 23.3 | (3.9) | 28.6 | (7.0) | 28.7 | (1.8) | 8.1* |
| 25–34 | 33.0 | (1.5) | 38.5 | (3.4) | 41.7 | (4.5) | 21.4 | (6.3) | 30.5 | (1.8) | 11.3* |
| 18–24 | 25.4 | (1.4) | 30.0 | (3.2) | 31.7 | (4.2) | 31.0 | (7.1) | 22.5 | (1.6) | 8.3* |
| Race- ethnicity (%) | 13.9 | ||||||||||
| Non- Hispanic Black | 55.3 | (1.6) | 52.0 | (3.5) | 52.5 | (4.6) | 69.0 | (7.1) | 55.9 | (1.9) | 4.6 |
| Non- Hispanic White | 29.1 | (1.4) | 28.5 | (3.2) | 30.0 | (4.2) | 14.3 | (5.4) | 30.0 | (1.8) | 4.8 |
| Hispanic | 12.2 | (1.0) | 14.5 | (2.5) | 16.7 | (3.4) | 14.3 | (5.4) | 10.5 | (1.2) | 5.2 |
| Other | 3.5 | (0.6) | 5.0 | (1.5) | 0.8 | (0.8) | 2.4 | (2.4) | 3.6 | (0.7) | 4.0 |
| Marital status (%) | 13.5* | ||||||||||
| Married/cohabitating | 41.1 | (1.5) | 39.5 | (3.5) | 36.7 | (4.4) | 40.5 | (7.6) | 42.5 | (1.9) | 1.7 |
| Previously married | 12.0 | (1.0) | 9.5 | (2.1) | 5.8 | (2.1) | 9.5 | (4.5) | 14.0 | (1.3) | 8.2* |
| Never married | 46.9 | (1.6) | 51.0 | (3.5) | 57.5 | (4.5) | 50.0 | (7.7) | 43.5 | (1.9) | 9.9* |
| Education (%) | 31.6* | ||||||||||
| College graduate or more | 18.4 | (1.2) | 13.5 | (2.4) | 10.0 | (2.7) | 7.1 | (4.0) | 22.1 | (1.6) | 18.4* |
| Some college | 43.2 | (1.5) | 38.5 | (3.4) | 46.7 | (4.6) | 42.9 | (7.6) | 44.0 | (1.9) | 2.6 |
| High school graduate | 26.7 | (1.4) | 30.0 | (3.2) | 30.8 | (4.2) | 40.5 | (7.6) | 24.0 | (1.7) | 8.7* |
| Not high school graduate | 11.8 | (1.0) | 18.0 | (2.7) | 12.5 | (3.0) | 9.5 | (4.5) | 9.9 | (1.2) | 10.0* |
| Income (%) | 0.8 | ||||||||||
| More than $35k | 34.1 | (1.7) | – | – | 32.5 | (4.3) | – | – | 34.4 | (1.8) | 0.2 |
| $19k to $35k | 31.4 | (1.7) | – | – | 35.0 | (4.4) | – | – | 30.8 | (1.8) | 0.8 |
| Less than $19k | 34.5 | (1.7) | – | – | 32.5 | (4.3) | – | – | 34.8 | (1.8) | 0.2 |
| Employed (%) | 77.6 | (1.5) | – | – | 80.8 | (3.6) | – | – | 77.0 | (1.6) | 0.8 |
| II. Pre- MVC APNS | |||||||||||
| Global pain diagnosis (%) | 31.5 | (1.4) | 32.0 | (3.3) | 33.3 | (4.3) | 40.5 | (7.6) | 30.5 | (1.8) | 2.1 |
| Global pain severity (M) | −0.0 | (0.0) | −0.0 | (0.1) | 0.0 | (0.1) | 0.3 | (0.2) | −0.0 | (0.0) | 1.6 |
| Body region pain severity (M) | −0.0 | (0.0) | −0.1 | (0.1) | −0.1 | (0.1) | 0.5 | (0.2) | −0.0 | (0.0) | 3.8* |
| Somatic symptom severity (M) | −0.0 | (0.0) | 0.1 | (0.1) | −0.0 | (0.1) | 0.5 | (0.2) | −0.0 | (0.0) | 4.4* |
| III. MVC characteristics | |||||||||||
| Role in vehicle (%) | 7.6 | ||||||||||
| Passenger | 24.6 | (1.3) | 28.5 | (3.2) | 25.0 | (4.0) | 26.2 | (6.8) | 23.3 | (1.6) | 2.3 |
| Driver, alone | 55.1 | (1.6) | 51.5 | (3.5) | 51.7 | (4.6) | 42.9 | (7.6) | 57.5 | (1.9) | 5.7 |
| Driver, with others | 20.3 | (1.3) | 20.0 | (2.8) | 23.3 | (3.9) | 31.0 | (7.1) | 19.2 | (1.5) | 4.1 |
| Severity of vehicular damage (%) | 6.2 | ||||||||||
| Severe | 58.8 | (1.5) | 59.0 | (3.5) | 60.0 | (4.5) | 61.9 | (7.5) | 58.3 | (1.9) | 0.3 |
| Moderate | 26.3 | (1.4) | 26.5 | (3.1) | 28.3 | (4.1) | 16.7 | (5.8) | 26.4 | (1.7) | 2.3 |
| Minor | 9.1 | (0.9) | 9.5 | (2.1) | 9.2 | (2.6) | 11.9 | (5.0) | 8.9 | (1.1) | 0.5 |
| No damage/missing | 5.8 | (0.7) | 5.0 | (1.5) | 2.5 | (1.4) | 9.5 | (4.5) | 6.5 | (1.0) | 4.2 |
| Transportation to ED | 6.0 | ||||||||||
| Not direct | 28.4 | (1.4) | 27.0 | (3.1) | 34.2 | (4.3) | 35.7 | (7.4) | 27.3 | (1.7) | 3.6 |
| Other direct | 14.8 | (1.1) | 17.5 | (2.7) | 13.3 | (3.1) | 7.1 | (4.0) | 14.7 | (1.4) | 3.3 |
| Ambulance | 56.8 | (1.5) | 55.5 | (3.5) | 52.5 | (4.6) | 57.1 | (7.6) | 58.0 | (1.9) | 1.4 |
| Personal injuries | |||||||||||
| Hit Head (self- reported) | 49.0 | (1.6) | 49.5 | (3.5) | 50.0 | (4.6) | 47.6 | (7.7) | 48.8 | (1.9) | 1.7 |
| Inpatient admission versus discharge | 4.0 | (0.6) | 2.0 | (1.0) | 6.7 | (2.3) | 4.8 | (3.3) | 4.1 | (0.8) | 4.4 |
| Injuries of others | |||||||||||
| Number injured in vehicle (M) | −0.0 | (0.0) | 0.0 | (0.1) | −0.0 | (0.1) | 0.3 | (0.2) | −0.0 | (0.0) | 1.3 |
| Injuries outside vehicle | 9.6 | (0.9) | 9.0 | (2.0) | 7.5 | (2.4) | 9.5 | (4.5) | 10.2 | (1.2) | 1.0 |
| IV. Peritraumatic APNS | |||||||||||
| Peritraumatic distress (M) | −0.0 | (0.0) | −0.2 | (0.1) | −0.0 | (0.1) | 0.2 | (0.2) | 0.0 | (0.0) | 3.2* |
| Peritraumatic dissociation (M) | −0.0 | (0.0) | −0.1 | (0.1) | 0.0 | (0.1) | 0.2 | (0.2) | 0.0 | (0.0) | 1.3 |
| Global pain diagnosis (%) | 88.0 | (1.0) | 89.5 | (2.2) | 86.7 | (3.1) | 92.9 | (4.0) | 87.5 | (1.3) | 1.7 |
| Global pain severity (M) | −0.0 | (0.0) | 0.0 | (0.1) | −0.1 | (0.1) | 0.3 | (0.2) | −0.0 | (0.0) | 1.3 |
| Body region pain severity (M) | −0.0 | (0.0) | −0.0 | (0.1) | −0.0 | (0.1) | 0.2 | (0.2) | −0.0 | (0.0) | 0.9 |
| Count of CSNW body region pain (M) | −0.0 | (0.0) | 0.0 | (0.1) | 0.0 | (0.1) | −0.1 | (0.1) | −0.0 | (0.0) | 0.1 |
| Somatic symptom severity (M) | −0.0 | (0.0) | 0.0 | (0.1) | 0.0 | (0.1) | 0.4 | (0.2) | −0.0 | (0.0) | 2.4 |
| V. Two- week APNS | |||||||||||
| Global pain diagnosis (%) | 80.7 | (1.4) | – | – | 76.7 | (3.9) | – | – | 81.4 | (1.5) | 1.4 |
| Global pain severity (M) | −0.0 | (0.0) | – | – | −0.1 | (0.1) | – | – | 0.0 | (0.0) | 1.2 |
| Count of CSNW body region pain (M) | −0.0 | (0.0) | – | – | −0.1 | (0.1) | – | – | 0.0 | (0.0) | 1.4 |
| VI. Eight- week APNS | |||||||||||
| Global pain diagnosis | 67.1 | (1.8) | – | – | – | – | 61.9 | (7.5) | 67.4 | (1.8) | 0.5 |
| (n) | (1,028) | (200) | (120) | (42) | (666) | ||||||
Abbreviation: CSNW, clinically significant, new, or worsening.
a
Entries are either percentages (%) or standardized means (M).
*
Significant difference across subgroups the 0.05 level, two- sided test.