The questionnaire consists of 14 items and each item is scored on a 5-point Likert agreement scale (ranging from strongly agree to strongly disagree). Only nine items are used in the scoring of the questionnaire with the remaining items considered 'distracters' from which no scores are derived. Possible scores range between 9 and 45, with lower scores indicating more maladaptive or pessimistic beliefs about back pain.

The Hospital Anxiety and Depression Scale (HADS) is a valid and reliable self-rating scale that measures anxiety and depression in both hospital and community settings. HADS gives clinically meaningful results as a psychological screening tool and can assess the symptom severity and caseness of anxiety disorders and depression in patients with illness and the general population.

One questionnaire, comprising fourteen questions. Each item on the questionnaire is scored from 0-3 and this means that a person can score between 0 and 21 for either anxiety or depression.

Scoring :

0-7- normal, 8-10-borderling abnormal, 11-21-abnormal

This questionnaire is about the way your back pain is affecting your daily life. People with back problems may find it difficult to perform some of their daily activities. For each activity there is a scale of 0 to 5 :0 - " not difficult at all " , 1 - " minimally difficult " , 2 - " somewhat difficult " , 3 - " fairly difficult " , 4 - " very difficult " and 5 - " unable to do ". Minimum detectable change (90% confidence) 15 points.

(Exercise Therapy Burden Questionnaire), consisting of 10 items. For each activity there is a scale of 0 to 10 : 0 - not agree at all, 10 - completely agree. Some items of the ETBQ belong to side effects and others to the workload of health care. (lower score=better)

The ASES includes 20 questions that represent three subscales: pain, function, and other symptoms. Score ranging : from 1 to 10 (higher = greater self-efficacy).

10-item RTWSE scale with the goal of assessing self-efficacy of workers to return to work within two conceptual domains: controlling pain at work and obtaining help. For each question there is a scale of to 5: 1 - not sure at all, 5 - really sure. Higher score = better self-efficiency.

Results can be reported in categories (low activity levels, moderate activity levels or high activity levels) or as a continuous variable (MET minutes a week). Scoring a HIGH level of physical activity on the IPAQ means your physical activity levels equate to approximately one hour of activity per day or more at least a moderate intensity activity level Scoring a MODERATE level of physical activity on the IPAQ means some activity more than likely equivalent to half an hour of at least moderate intensity physical activity on most days.

Scoring a LOW level of physical activity on the IPAQ means any of the criteria for either MODERATE of HIGH levels of physical activity.

This scale evaluates all aspects of patients' health and assesses if there has been an improvement or decline in clinical status. It consists of one item.

Patient choose: 1 -No change (or condition has gotten worse), 2 - Almost the same, hardly any change at all, 3 - A little better, but no noticeable change, 4 - Somewhat better, but the change has not made any real difference, 5 - Moderately better, and a slight but noticeable change, 6 - Better and a definite improvement that has made a real and worthwhile difference, 7 - A great deal better and a considerable improvement that has made all the difference.