Ived and modified variables A categorical variable corresponding to subject's number of comorbidities self-reported to

Ived and modified variables A categorical variable corresponding to subject’s number of comorbidities self-reported to be severely affecting their health was derived utilizing baseline information and facts. Age was categorized into the following age groups: 183, 249, 309, 409 and 50 years. The cut-points were selected to distribute subjects approximately equally across the age groups, and have been employed in previous studies using this cohort.two.3. Statistical analysisThe baseline qualities with the cohort were described using medians with interquartile ranges (IQR) and frequencies with proportions ( ). Medians had been utilized instead of implies due to the fact continuous variables had skewed distributions. The annual overall, age- and sex-specific incidence rates of MBP per 100,000 Eledone peptide web population were calculated1488 Eur J Discomfort 19 (2015) 1486–2015 The Authors. European Journal of Discomfort published PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21346730 by John Wiley Sons Ltd on behalf of European Discomfort Federation – EFICM.S. Johansson et al.Mid-back pain just after site visitors collisionsTable 1 Baseline qualities presented as frequencies with percentages or medians with interquartile ranges of 3711 Saskatchewan (Canada) residents with mid-back pain soon after visitors collisions occurring in 1997999. Baseline characteristics n ( )Median (IQR) Missing values 0Table 1 (Continued) Baseline characteristics n ( )Median (IQR) Missing valuesWomen 2484 (66.9) Age group (years) 183 790 (21.3) 249 567 (15.3) 309 894 (24.1) 409 714 (19.two) 50 746 (20.1) Median age (years) 35.7 (25.37.two) Marital status Single 1279 (34.five) Married 1934 (52.1) Widowed 104 (two.eight) Separated 392 (10.6) Education level High college graduate or decrease 1713 (46.three) A lot more than high college graduate 1988 (53.7) Annual household household earnings (CAD) 20,000 1211 (33.six) 20,000 to 40,000 1127 (31.3) 40,000 to 60,000 708 (19.7) 60,000 554 (15.4) Variety of dependents two 3267 (88.1) three 443 (11.9) Discomfort location and median discomfort intensity score (NRS-11) Head 3001 (81.0) Head pain intensity 6 (6) Neck 3545 (95.three) Neck pain intensity 7 (5) Low back 2846 (76.8) Low back discomfort intensity six (2) Mid back 3711 Mid-back discomfort intensity 6 (5) Arm 1824 (49.two) Arm discomfort intensity 0 (0) Hand 936 (25.2) Hand discomfort intensity 0 (0) Wellness now in comparison to 1 year ago 1514 (40.9) Somewhat or substantially improved, or regarding the identical Somewhat or a lot worse 2192 (59.2) Quantity of severely affecting comorbiditiesa, range 0 0 2394 (64.9) 1 801 (21.7) 2 300 (eight.1) 3 196 (five.3) Depressive symptoms Median CES-D score 16 (7.46.3) Expectations for recovery Get superior quickly 736 (19.9) Get greater slowly 1583 (42.7) Never ever get superior 88 (2.four) Do not know 1300 (35.1)Other symptoms experienced after the collision Pain when moving neck 3085 (83.1) Sleeping difficulties 2645 (71.three) Reduced ability to move neck 2611 (70.4) Unusual fatigue or tiredness 1993 (53.7) Anxiety 1796 (48.four) Vertigodizziness 1754 (47.3) Irritability 1589 (42.eight) Arm numbness 1584 (42.7) Concentrationattention complications 1057 (28.5) Leg numbness 1029 (27.7) Sore jaw 763 (20.6) Memory problems 666 (18.0) Post-crash amnesia, quickly immediately after collision No 3130 (84.three) Yes 270 (7.three) Usually do not know 311 (eight.4) Earlier injury claim (MVC); SGI No 2411 (69.1) Yes 1077 (30.9) Previous injury claim (non-MVC); other insurancedisability strategy No 2717 (77.83) Yes 774 (22.2)four 38 0 44 four 43 0 69 three 25 1 22n, the quantity 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.