Logo of blackwellopenThis ArticleFor AuthorsLearn MoreSubmit
European Journal of Pain (London, England)
PMC full text:

Table 1

Return to:   A Population-based, Incidence Cohort Study of
Mid-back Pain After Traffic Collisions

Baseline characteristics presented as frequencies with percentages or medians with interquartile ranges of 3711 Saskatchewan (Canada) residents with mid‐back pain after traffic collisions occurring in 1997–1999

Baseline characteristics n (%)/Median (IQR)Missing values
Women2484 (66.9)0
Age group (years)
18–23790 (21.3)0
24–29567 (15.3)
30–39894 (24.1)
40–49714 (19.2)
≥50746 (20.1)
Median age (years)35.7 (25.3–47.2)
Marital status
Single1279 (34.5)2
Married1934 (52.1)
Widowed104 (2.8)
Separated392 (10.6)
Education level
High school graduate or lower1713 (46.3)10
More than high school graduate1988 (53.7)
Annual family household income (CAD)
≤$20,0001211 (33.6)111
>$20,000 to ≤$40,0001127 (31.3)
>$40,000 to ≤$60,000708 (19.7)
>$60,000554 (15.4)
Number of dependents
≤23267 (88.1)1
≥3443 (11.9)
Pain location and median pain intensity score (NRS‐11)
Head3001 (81.0)4
Head pain intensity6 (6–6)38
Neck3545 (95.3)0
Neck pain intensity7 (5–8)44
Low back2846 (76.8)4
Low back pain intensity6 (2–8)43
Mid back37110
Mid‐back pain intensity6 (5–8)69
Arm1824 (49.2)3
Arm pain intensity0 (0–5)25
Hand936 (25.2)1
Hand pain intensity0 (0–5)22
Health now compared to 1 year ago
Somewhat or much better, or about the same1514 (40.9)5
Somewhat or much worse2192 (59.2)
Number of severely affecting comorbiditiesa, range 0–9
02394 (64.9)20
1801 (21.7)
2300 (8.1)
≥3196 (5.3)
Depressive symptoms
Median CES‐D score16 (7.4–26.3)109
Expectations for recovery
Get better soon736 (19.9)4
Get better slowly1583 (42.7)
Never get better88 (2.4)
Do not know1300 (35.1)
Other symptoms experienced after the collision
Pain when moving neck3085 (83.1)0
Sleeping problems2645 (71.3)
Reduced ability to move neck2611 (70.4)
Unusual fatigue or tiredness1993 (53.7)
Anxiety1796 (48.4)
Vertigo/dizziness1754 (47.3)
Irritability1589 (42.8)
Arm numbness1584 (42.7)
Concentration/attention problems1057 (28.5)
Leg numbness1029 (27.7)
Sore jaw763 (20.6)
Memory problems666 (18.0)
Post‐crash amnesia, immediately after collision
No3130 (84.3)0
Yes270 (7.3)
Do not know311 (8.4)
Previous injury claim (MVC); SGI
No2411 (69.1)8
Yes1077 (30.9)
Previous injury claim (non‐MVC); other insurance/disability plan
No2717 (77.83)5
Yes774 (22.2)
n, the number corresponding to the characteristic; IQR, interquartile range; CAD, Canadian dollar; NRS‐11 is numerical rating scale, CES‐D, Centre for Epidemiological Studies – Depression Scale; MVC, motor vehicle collision; SGI, Saskatchewan Government Insurance (universal traffic insurer in Saskatchewan).

aComorbidities includes non‐traumatic musculoskeletal disorders, allergies, respiratory diseases, hypertension, cardiovascular diseases, gastrointestinal disorders, diabetes mellitus, renal or genitourinary diseases, neurological deficits, headaches, mental illnesses and cancer. The highest possible number of severely affecting comorbidities was 12.