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- Open Access
Validation of the Orebro musculoskeletal pain screening questionnaire in patients with chronic neck pain
BMC Research Notesvolume 11, Article number: 161 (2018)
To validate the German version of OMPSQ (OMPSQ-G) for patients with chronic neck pain.
After translating OMPSQ to German, we assessed the discriminant validity between patients and healthy adults. Convergent validity was assessed using Pearson’s correlation coefficients between domains of OMPSQ-G and the German version of neck disability index (NDI-G) and visual analogue scale (VAS) of neck pain intensity. Floor and ceiling effects, internal consistency, test–retest and relative reliability were assessed. Fifty patients with chronic neck pain (mean age, 43.6 years; 34 females) and 24 healthy adults (mean age, 50.4 years; 18 females) participated. Mann–Whitney U tests showed significant differences in OMPSQ scores between both groups at the baseline (z = − 4.6; p < 0.001) and second time point (z = − 4.8; p < 0.001). OMPSQ-G scores highly and moderately correlated with NDI-G (ρ = 0.70) and VAS (ρ = 0.41) scores, respectively. There were no floor or ceiling effects. Cronbach’s alpha was 0.94. OMPSQ-G showed high reliability (intraclass correlation 2.1: 0.93; standard error of measurement, 6.9; smallest detectable change, 20 points). The Bland–Altman plot indicated no systematic error. OMPSQ-G showed good validity and reliability in patients with neck pain.
Trial registration NCT02540343
Neck pain is a common complaint that affects 70% of individuals at least once in their lifetime . Only low back pain (LBP) causes more time off work than neck pain . A frequently used assessment of LBP is the Orebro musculoskeletal pain screening questionnaire (OMPSQ), developed by Linton and Hallden . OMPSQ can be used to identify patients with spinal pain . OMPSQ has been translated into French, Turkish, Spanish, Chinese, Brazilian–Portuguese, Persian [5,6,7,8,9,10], including a short form of the questionnaire . The short-form OMPSQ has been translated into German . The original (long-form) version has not previously been translated into German and tested for its psychometric properties. To date, OMPSQ has been mainly used in patients with LBP, and few authors have reported using OMPSQ in patients with neck pain [13, 14]. They concluded that OMPSQ could be used as tool for predicting functional outcomes at 8 weeks after the initial manual therapy assessment in patients with LBP, whereas the ability for predicting outcomes of patients with neck pain is uncertain. Gabel et al.  used the OMPSQ to investigate patients with whiplash-associated disorder.
So far the original German version of OMPSQ has not previously been validated in patients with chronic neck pain. This study aimed to evaluate OMPSQ-G in German-speaking patients with chronic neck pain. In addition, discriminant and construct validity and reliability were evaluated.
This is a translation and validation study. At the beginning the original OMPSQ was translated and culturally adapted into German and afterwards tested for its validity and reliability in patients with chronic neck pain.
Questionnaire translation process
This project was authorised by the author of the original OMPSQ. Language translation was based on the original OMPSQ . The cross-cultural adaptation and translation followed the guidelines for the process of cross-cultural adaption of self-report measures by Beaton et al. . Two independent native German speakers translated and culturally adapted the original version. After a consensus meeting, two additional translators back-translated the German version of OMPSQ into English. The pre-final German version of OMPSQ (OMPSQ-G) was pre-tested in five healthy German-speaking volunteers, revealing no difficulties in understanding the questionnaire. Finally, the expert committee concluded that no further adaptations to OMPSQ-G were required.
From November 2014 until October 2016, 50 patients with chronic neck pain were recruited from the department of chiropractic medicine at Balgrist University Hospital. All patients had chronic neck pain for at least 90 days before enrolling for the study  and were able to speak, read and write German. Patients were excluded for ‘red flags’ such as acute trauma, severe pain, signs of spinal cord compression and acute inflammatory arthritis.
Furthermore, a group of 26 healthy adults without neck pain were recruited from a local clinic. As recommended by the ethics committee, these subjects should not have any medical knowledge or background.
During a baseline visit, demographic characteristics were collected, and all participants were asked to independently complete three questionnaires [OMPSQ, NDI and visual analogue scale (VAS)]. After 3–7 days, all participants were asked to independently complete all questionnaires a second time at home and to send them back in a prepaid envelope. Therefore, it can be assumed that the conditions were similar when the participants filled out both the questionnaires. If the questionnaires were not returned by day 4, the participant received a reminder telephone call. Participants who did not return the questionnaires by day 7 were excluded from the study. The mean imputation was conducted for values missing from OMPSQ-G . If more than three items of the questionnaire were unanswered, the questionnaire was excluded from further analyses .
OMPSQ is a self-administered pain screening questionnaire that was developed to identify patients with acute or subacute musculoskeletal pain who are at risk of delayed recovery [3, 17]. A higher score indicates a higher disability. The maximum score is 210 points; a score of < 105 points indicates a low disability, that between 105 and 130 points indicates a moderate disability and that > 130 points indicates a high disability .
NDI is a questionnaire used for assessing self-rated disability in patients with neck pain of mechanical origin . It has been translated into a reliable German version (NDI-G) . Scoring 0 points being the best possible score and 50 being the worst .
Descriptive statistics were used to describe participant characteristics. Consistency of the patients’ pain was tested using paired t-test of VAS scores.
To assess discriminant validity, the ability of OMPSQ-G to differentiate between healthy adults and patients with chronic neck pain was tested using Mann–Whitney U test. All other tests were conducted in the chronic neck pain sample. Criterion validity was established by correlating the total score of OMPSQ-G with those of VAS and NDI-G. Spearman’s coefficient values were interpreted as excellent (> 0.9), good (0.7–0.9), moderate (0.5–0.69), fair (0.2–0.5) or minimal-to-absent (0.0–0.2) . A factor analysis with maximum likelihood extraction and varimax rotation with Kaiser normalisation was performed to assess the internal structure of the translated questionnaire. Items with loadings > 0.4 were automatically included within the matrix and items with a loading < 0.4 were inspected for clinical relevance . Floor and ceiling effects of OMPSQ-G in participants were used to assess content validity. Additionally, we conducted sub-group analysis for correlations of OMPSQ-G, NDI-G and VAS in healthy participants and chronic neck pain patients.
Intraclass correlation coefficients (ICCs) and their associated 95% confidence intervals (CIs) were selected to calculate the test–retest reliability of OMPSQ-G in patients with chronic neck pain . ICC values of > 0.70 were considered to be acceptable . In addition, internal consistency was measured. Cronbach’s α values of 0.7–0.95 were deemed to be adequate . To assess absolute reliability, the standard error of measurement (SEM) and smallest detectable change (SDC) were calculated . Limits of agreement (LoA) and systematic bias were assessed using Bland–Altman plots . Analyses were performed using SPSS Version 22.0 statistical software (SPSS, Inc. Chicago, IL, USA), and the statistical significance level was set at 5%.
The translated OMPSQ-G was pre-tested in 10 patients with complaints of chronic neck pain. The general impression of these patients was that OMPSQ-G was easy to understand. No changes were made to OMPSQ-G after the pre-test (Additional file 1).
Seventy-six participants (50 patients with chronic neck pain and 26 healthy adults) were included in this study. Two healthy adults had more than three missing items and were excluded from the analysis. Thirteen of 1050 total items (1.2%) were missing values ‘not working’ at the baseline, and 14 of 1050 items (1.3%) were missing at the second time point. Furthermore, three different items from three separate patients were missing (0.2%).
Patients’ pain levels were considered consistent because VAS scores did not significantly change (p = 0.92). Participant characteristics and results of all questionnaires at the two time points are shown in Table 1.
Mann–Whitney U tests showed significant differences in OMPSQ-G scores between the two groups at baseline (z = − 4.6; p < 0.001) and at the second time point (z = − 4.8; p < 0.001). All Spearman’s rho (ρ) coefficients that assessed the correlation between questionnaire scores were significant at baseline (OMPSQ-G and NDI-G at baseline, ρ = 0.71; OMPSQ-G and VAS, ρ = 0.41) and at the second time point (OMPSQ-G and NDI-G, ρ = 0.70; OMPSQ-G and VAS, ρ = 0.58). No floor or ceiling effects were observed. The lowest and highest possible OMPSQ-G scores were only found once. Sub-group analysis revealed the following correlations in healthy participants: OMPSQ-G and NDI-G (ρ = 0.355, p = 0.089, − 0.066 to 0.684 95% CI), OMPSQ-G and VAS (ρ = 0.061, p = 0.778, − 0.322 to 0.459 95% CI), NDI-G and VAS (ρ = 0.544, p = 0.006, 128–0.846 95% CI). In chronic neck pain patients the correlations were as follows: OMPSQ-G and NDI-G (ρ = 0.726, p = 0.000, 0.572–0.826 95% CI), OMPSQ-G and VAS (ρ = 0.425, p = 0.002, 0.170–0.641 95%) and NDI-G and VAS (ρ = 0.604, p = 0.000, 0.406–0.748 95% CI).
OMPSQ-G showed high test–retest reliability (ICC, 0.93; 95% CI, 0.88–0.96). Cronbach’s alpha was 0.94, SEM was 6.9 and SDC was 19.3 points. Bland–Altman plot (Fig. 1) indicated that all points besides three were located within the 95% LoA for test–retest reliability. No systematic error was observed.
This is the first translation of the long-form OMPSQ into German, which accompanies the earlier translated short-form OMPSQ . As there are only a few missing values, patients and healthy participants had no problem to understand the questions, given in the questionnaire. Mean scores of OMPSQ-G were quite low in this sample of patients with chronic neck pain compared with those of a previous study in patients with acute and subacute neck pain . However, the scores of OMPSQ-G were consistent with those of NDI-G and VAS; NDI-G indicated mild disability , and the VAS score indicated moderate pain . OMPSQ-G, NDI and VAS scores showed large variance.
Comparison with other studies
This is the first study to show that OMPSQ-G can discriminate between patients with chronic neck pain and healthy adults. Assessment of criterion validity also revealed a good correlation between OMPSQ-G and neck disability scores and a fair correlation with pain scores and comparable with those reported in a previous study . We found no floor or ceiling effects, similar to findings in the Brazilian–Portuguese version of OMPSQ . Test–retest reliability (i.e. ICC) of OMPSQ-G was considered acceptable, despite the small sample size, which was considered to be acceptable given that the lower CI of ICC was above the minimum accepted level for reliability. The SDC value was smaller than that observed in the Brazilian–Portuguese version of OMPSQ-G in patients with LBP .
In conclusion, given the good validity and reliability of OMPSQ-G demonstrated in this study, the questionnaire can be considered a validated tool for identifying patients with chronic neck pain. The next research step should be to assess the predictive validity of OMPSQ-G.
The OMPSQ-G was not tested in patients with acute neck pain. Although a test–retest interval of 2 weeks is recommended to minimize the effect of recognition, a shorter interval was selected owing to possible varying symptoms in patients with chronic neck pain. Due to the small sample size generalising the results of this study should be performed with caution, and further analysis is recommended for future studies.
intraclass correlation coefficient
low back pain
level of agreement
German version of the neck disability index
German version of the Orebro musculoskeletal pain screening questionnaire
standard error of measurement
smallest detectable change
visual analogue scale
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AL developed the study protocol, collected data, conducted the statistical analysis and wrote the paper. CB supervised the development of the study protocol, helped with the statistical analysis and critically reviewed the paper. FB helped to develop the study protocol and critically reviewed the paper. JS helped to develop the study protocol, conducted the statistical analysis and wrote the paper. All authors read and approved the final manuscript.
The authors declare that they have no competing interests.
Availability of data and materials
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
Consent for publication
Ethics approval and consent to participate
All participants gave their informed written consent. Ethical approval was obtained from the local ethics commissions of the Canton of Zürich Nr: 2013-0394 and registered by ClinicalTrials.gov identifier: NCT02540343.
The study was supported by a grant from physioswiss.
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