Table 1 Descriptive Baseline Characteristics of the Samples from Saskatchewan and Ontario
Province | |||
|---|---|---|---|
Baseline Prognostic Factors | Saskatchewan | Ontario | Phase of evidence* |
(N = 4917) | (N = 340) | ||
Age in years [mean (s.d.)] | 38.3 (15.1) | 40.5 (13.2) | I, II |
Female [frequency (%)] | 3263 (66.3%) | 229 (67.3%) | I, II |
Married or common law | 2638 (53.6%) | 184 (54.0%) | n/a |
Employed (paid employment) | 4138 (84.1%) | 286 (84.1%) | I, II |
Average Neck Pain [mean (s.d.)] | 6.5 (2.1)# | 5.7 (2.1) | I, II |
Average Low Back Pain [mean (s.d.)] | 3.8 (3.5)## | 4.2 (3.3) | |
CES-D scores [mean (s.d.)] | 16.3 (12.0)### | 15.4 (12.6) | n/a |
Depression (> 27 points on CES-D) [frequency (%)]) | 984 (20.0%) | 60 (17.7%) | I, II, III |
Prior Neck Injury [frequency (%)] | 1156 (23.6%) | 2 (0.59)+ | III |
Post collision anxiety or worry [frequency (%)] | 2149 (43.7%) | 210 (62.0%) | I, II, III |
Disability [frequency (%)] | 3769 (76.6%) | I, II | |
Whiplash Disability Questionnaire [mean (s.d.)] | 54.8 (29.3) | I, II | |
Concentration Problems [frequency (%)] | 1221 (24.8%) | 121 (35.6%) | n/a |
Percent of Body in Pain [mean (s.d.)] | 23.6 (15.7) | n/a++ | n/a |
Muscle, bone or joint problems++ [frequency (%)] | n/a | ||
Doesn’t have it | 197 (57.1) | ||
None or mild effect on life | 118 (34.7) | ||
Moderate or severe effect on life | 28 (8.2) | ||
Expectations of recovery [frequency (%)] | (5 missing values) | I, II, III | |
Get better soon | 1224 (24.9%) | 165 (48.5%) | |
Get better slowly | 2060 (41.9%) | 101 (29.7%) | |
Never get better | 90 (1.8%) | 3 (0.9%) | |
Don’t know | 1539 (31.3%) | 71 (20.9%) | |
Days since injury [median (range)] | 9.0 (0–21) | 6.0 (0–25) | none |