Measuring objective physical activity in people with chronic low back pain using accelerometers: a scoping review.

Purpose: Accelerometers can be used to objectively measure physical activity. They could be offered to people with chronic low back pain (CLBP) who are encouraged to maintain an active lifestyle. The aim of this study was to examine the use of accelerometers in studies of people with CLBP and to synthesize the main results regarding the measurement of objective physical activity. Methods: A scoping review was conducted following Arksey and O'Malley's framework. Relevant studies were collected from 4 electronic databases (PubMed, Embase, CINHAL, Web of Science) between January 2000 and July 2023. Two reviewers independently screened all studies and extracted data. Results: 40 publications out of 810 citations were included for analysis. The use of accelerometers in people with CLBP differed across studies; the duration of measurement, physical activity outcomes and models varied, and several limitations of accelerometry were reported. The main results of objective physical activity measures varied and were sometimes contradictory. Thus, they question the validity of measurement methods and provide the opportunity to discuss the objective physical activity of people with CLBP. Conclusions: Accelerometers have the potential to monitor physical performance in people with CLBP; however, important technical limitations must be overcome.

[Translation of the Occupational Balance Questionnaire in French and its Validation]. / Traduction de l'Occupational Balance Questionnaire en français et sa validation.

Background. Questionnaires measuring occupational balance have been created in recent years, but those available in French are limited. Purpose. This study aimed to translate and transculturally adapt the Occupational Balance Questionnaire and to examine the internal consistency, test-retest reliability and convergent validity of the French version. Methodology. A cross-cultural validation was conducted with adults in Quebec (n = 69) and in French-speaking Switzerland (n = 47). Results. Internal consistency was good in both regions (α > 0.85). Test-retest reliability was satisfactory in Quebec (ICC = 0.629; p < 0.001), but a significant difference was found between the two measurement times in French-speaking Switzerland. Significant associations were found between the results of the Occupational Balance Questionnaire and those of the Life Balance Inventory (Quebec, r = 0.47; French-speaking Switzerland, r = 0.52). Implications. These initial results support the use of the OBQ-French in the general population of two French-speaking regions.

Description. Des questionnaires visant à mesurer l'équilibre occupationnel ont été créés ces dernières années, mais ceux disponibles en français sont limités. But. Cette étude visait à traduire et adapter transculturellement l'Occupational Balance Questionnaire et à examiner la cohérence interne, la fidélité test-retest et la validité convergente de la version en français. Méthodologie. Une validation a été effectuée auprès de personnes adultes au Québec (n = 69) et en Suisse romande (n = 47). Résultats. La cohérence interne est bonne dans les deux régions (α > 0,85). La fidélité test-retest est satisfaisante au Québec (ICC = 0,629 ; p < 0,001), mais une différence significative est relevée entre deux passations en Suisse romande. Une relation significative est démontrée entre l'équilibre occupationnel et l'équilibre de vie (Québec r = 0,47 ; Suisse romande r = 0,52). Conséquences. Ces premiers résultats soutiennent l'utilisation de l'OBQ-français auprès de la population générale de deux régions francophones.

Psychometric Properties of the French European Little Developmental Coordination Disorder Questionnaire (LDCDQ-FE): A Pilot Study.

AIMS: The Little Developmental Coordination Disorder Questionnaire (LDCDQ) is a parental questionnaire designed to identify preschool children at risk of Developmental Coordination Disorder (DCD). This study aimed to translate and cross-culturally adapt the LDCDQ for French European informants (Little Developmental Coordination Disorder Questionnaire-French European [LDCDQ-FE]) and to undertake a pilot examination of its psychometric properties on a French sample. METHODS: A thorough process of cultural adaptation was completed. The psychometric properties were examined with a sample of 154 French children aged to 5y11m (control = 121; clinically referred = 33). A sub-group of 34 children was assessed using the MABC-2 to measure convergent validity. RESULTS: Principal component analysis demonstrated a four-component structure, accounting for 67.5% of the variance. Internal consistency was acceptable to good (α = 0.74-0.89). Significant correlation between the LDCDQ-FE and the MABC-2 total scores showed convergent validity. Discriminant validity was supported by significant score differences between the clinically referred and a matched control sub-group. Using ROC curves, a cutoff of 67 was proposed for a sensitivity of 81.3% and a specificity of 77.8%. CONCLUSIONS: Results show initial evidence of the psychometric properties of the LDCDQ-FE and are encouraging of its use to identify young preschoolers at risk for DCD. In future studies, the test-retest reliability should be investigated, and study sample sizes expanded.

Psychometric assessment of the French European Developmental Coordination Disorder Questionnaire (DCDQ-FE).

BACKGROUND: The Developmental Coordination Disorder Questionnaire'07 (DCDQ'07) is a parent-report measure to identify children at risk for Developmental Coordination Disorder (DCD). We developed a French version of the DCDQ'07 (DCDQ-FE) that has shown excellent inter-language reliability (intraclass correlation coefficient (ICC) = 0.91) and is culturally relevant for use in European countries. The aims of this study were to examine the internal consistency, test-retest reliability, construct validity of the Developmental Coordination Disorder Questionnaire-French European (DCDQ-FE), as well as establish a cut-off score. METHODS: The psychometric properties of the DCDQ-FE were examined with a clinical group of 30 children (mean age: 9.4 years, SD = 2.6) and a control group of 43 children (mean age: 9.1 years, SD = 2.4). Their parents (n = 73) filled out the DCDQ-FE at a first sitting and 70 of them filled it out 38 days later in average for test-retest reliability. The children were assessed using the Movement Assessment Battery for Children-2 (MABC-2) so as to measure the convergent validity of the DCDQ-FE. The cut-off score was determined with an additional sample of 42 children according to scores on the MABC-2 (≥ 16th percentile) (n = 115). RESULTS AND IMPLICATIONS: Internal consistency of the DCDQ-FE was excellent (Cronbach's alpha = 0.96) and test-retest reliability was good (ICC = 0.956) with no differences between scores obtained at the two sittings (p > 0.05). Differences in scores between children in the clinical and control groups (Z = -6.58, p < 0.001) provide evidence of construct validity. The correlation obtained between DCDQ-FE and MABC-2 scores (Spearman's rho correlation coefficient = 0.802, p < 0.001) supports convergent validity. Using a cut-off of 56, overall sensitivity and specificity were 85.0% and 81.6% respectively (area under the curve = 0.896). The DCDQ-FE is a reliable and valid questionnaire for detecting children who are at risk for DCD in a European-French population of children aged 5 to 15 years old.

Reliability of maximal grip strength measurements and grip strength recovery following a stroke.

STUDY DESIGN: Clinical measurement. PURPOSE: The test-retest reliability of maximal grip strength measurements (MGSM) is examined in subjects for 12 weeks post-stroke together with maximal grip strength recovery and the maximal-grip and upper-extremity strength measurements' relationship with capacity and performance test scores. METHODS: A Jamar dynamometer and the Motricity Index (MI) were used for strength measurements. The Chedoke Arm and Hand Activity Inventory and ABILHAND questionnaire for evaluating capacities and performances. RESULTS: MGSM were reliable (Intraclass Correlation Coefficients = 0.97-0.99, Minimal Detectable Differences = 2.73-4.68 kg). Among the 34 participants, 47% did not have a measurable grip strength one week post-stroke but 50% of these recovered some strength within the first eight weeks. The MGSM and MI scores were correlated with scores of tests of capacity and performance (Spearman's Rank Correlation Coefficients = 0.69-0.94). CONCLUSIONS: MGSM are reliable in the first weeks after a stroke. LEVEL OF EVIDENCE: N/A.

European-French Cross-Cultural Adaptation of the Developmental Coordination Disorder Questionnaire and Pretest in French-Speaking Switzerland.

UNLABELLED: The Developmental Coordination Disorder Questionnaire (DCDQ'07) is a Canadian-English instrument recommended for screening children aged 5 to 15 years who are at risk for developmental coordination disorder. While a Canadian-French version of the DCDQ'07 presently exists, a European-French version does not. AIMS: To produce a cross-cultural adaptation of the DCDQ'07 for use in areas of Europe where French is spoken and to test its cultural relevance in French-speaking Switzerland. METHODS: Cross-cultural adaptation was done using established guidelines. Cultural relevance was analyzed with cognitive interviews of thirteen parents of children aged 5.0 to 14.6 years (mean age: 8.5 years, SD = 3.4), using think-aloud and probing techniques. RESULTS: Cultural and linguistic differences were noted between the European-French, the Canadian-French, and the original versions of the DCDQ'07. Despite correct translation and expert committee review, cognitive interviews revealed that certain items of the European-French version were unclear or misinterpreted and further modifications were needed. CONCLUSIONS: After rewording items as a result of the outcomes of the cognitive interview, the European-French version of the DCDQ'07 is culturally appropriate for use in French-speaking Switzerland. Further studies are necessary to determine its psychometric properties.

Reliability of maximal static strength measurements of the arms in subjects with hemiparesis.

OBJECTIVE: To evaluate the reliability of maximal static strength measurements of five arm muscle groups and of strength ratios (paretic/non-paretic) in subjects with poststroke hemiparesis. DESIGN: The generalizability theory was used to estimate the reliability coefficients and standard errors of measurement of maximal strength for various combinations of trials and sessions and of the strength ratios for one and two sessions. Grip maximal voluntary force and/or maximal voluntary torques exerted by flexor and extensor muscles at both the elbow and shoulder joints were measured in 17 subjects with poststroke hemiparesis. Multiple trials were performed by subjects during two sessions. SETTING: Rehabilitation centre. SUBJECTS: A convenience sample of 17 subjects with poststroke hemiparesis. RESULTS: The reliability coefficients for the strength measurements were in the range of 0.81-0.97 with standard errors of measurement accounting for 4% to 20% of the group means. For the strength ratios, the coefficients of generalizability ranged from 0.76 to 0.95 with standard errors of measurement equal to 6% to 19% of the group means. CONCLUSIONS: The maximal strength measurements of the arms in subjects with hemiparesis are reliable. The strength ratios are also reliable and can be used to quantify strength impairment.

Differences in the magnitude and direction of forces during a submaximal matching task in hemiparetic subjects.

Stroke patients often exhibit large imbalances in strength between the two upper limbs (ULs) and between the different muscle groups of the paretic UL. The aim of the study was to compare the ability of hemiparetic and normal subjects to produce symmetrical forces with both ULs and to determine whether the differences between force vectors can be predicted by a model accounting for the weakness of the different muscle groups or from clinical characteristics. Sixteen hemiparetic and 16 control subjects were assessed using static dynamometers in which both ULs were fixed. They were asked to produce symmetrical sub-maximal forces (in terms of direction and magnitude) with both ULs in four directions in the sagittal plane, which covers all possible combinations of flexion and extension at the shoulder and the elbow. Fifteen trials were performed, and the subjects were asked to gradually increase the forces produced from one trial to another. In addition, the maximal voluntary force (MVF) was measured unilaterally on both sides under two conditions: single-joint MVF (isolated flexion or extension at the elbow or the shoulder) and multi-joint MVF (same directions as the bilateral task). During the bilateral task, the stroke subjects generally showed larger errors between limbs than the control subjects, although they were able to produce sufficient force in the required directions during multi-joint MVF. The difference between groups was statistically significant in the four target directions for the errors in the magnitude, and in two target directions for the errors in direction (p<0.01). Differences predicted by a model based on the relative single-joint MVFs show a moderate association with errors observed for the magnitude (p=0.001-0.11, R2=0.17-0.54), but not for the direction of forces (p>0.1, R2<0.16). Several clinical features were examined as potential predictors using stepwise multiple regressions. The mean multi-joint MVF and proprioceptive impairments were the best predictors of mean errors in the magnitude of force (p<0.001, R2=0.82) whereas the mean angular errors were best explained by proprioceptive impairments (p=0.01, R2=0.38). Inaccurate internal representations of the paretic UL might explain why asymmetries were observed even though motor capacities were sufficient to perform successfully.

Effects of weakness on symmetrical bilateral grip force exertion in subjects with hemiparesis.

It has been shown that, in a bilateral force-matching task, subjects presenting weakness in one limb produce a lower force in the weakened limb even though they subjectively perceive that they are exerting the same force. The aim of this study was to verify whether subjects with hemiparesis produced asymmetrical forces during a bilateral submaximal grip task and whether this asymmetry is related to weakness of the paretic limb. Fifteen subjects with hemiparesis and 15 healthy subjects were recruited. First, the maximal voluntary force was measured for each hand. Then, subjects were asked to exert equal forces with both hands simultaneously at three submaximal force levels using two dynamometers. In the bilateral task, the force ratios (paretic/nonparetic or nondominant/dominant) differed between groups. Severely weak hemiparetic subjects produced lower force ratios than mildly weak hemiparetic subjects and healthy subjects (P < 0.000), whereas there was no difference between the force ratios produced by mildly weak hemiparetic subjects and those produced by healthy subjects. In subjects with hemiparesis, the force ratios in the bilateral task were related to the ratios of maximal voluntary forces (R2 = 0.39-0.66, P < or = 0.013) and the presence of somatosensory impairment did not affect these relationships. These results suggest that the strategy used is to compare the intensity of the motor commands on both sides and then perform the force-matching task. The use of such a strategy by subjects who have had paresis for 1 year reflects a lack of adaptation to their weakness.