Relationships Between Stepping-Reaction Movement Patterns and Clinical Measures of Balance, Motor Impairment, and Step Characteristics After Stroke

Balance impairment and associated factors among stroke survivors in public hospitals of Amhara regional state: a multicenter cross-sectional study

INTRODUCTION

Balance impairment is one of the common impairments in patients after stroke. It can lead to depression reduced speed of mobility, dependent on assistive device and reduce quality of life. However, evidence on balance impairment and its risk factors among stroke survivors in Ethiopia was lacking particularly in the study area. Therefore, this study aimed to investigate prevalence and associated factors of balance impairment among stroke survivor's attendee at an outpatient clinic in Amara regional state comprehensive specialized hospital.

METHODS

An institutional based cross-sectional study was conducted from April1-June 30, 2022. A total of 400 participants were selected using the systematic random sampling technique. Standard Berg balance scale tool and semi-structure questionnaire was used. Multicollinearity and model fitness were checked. Variables with a p-value of less than 0.25 in the Bivariable regression were entered into a multivariable logistic regression and p value < 0.05 was used as cutoff point for significant variables.

RESULT

The prevalence of balance impairment was 51.5% (95% CI (46.58, 56.39). Being depressed (AOR = 12.25:95% CI (4.727, 31.779), using walking aids (AOR = 8.76:95%CI3.469, 22.117)), abnormal speed (AOR = 6.73:95%CI (2.671, 16.977)), did not have physiotherapy treatment (AOR = 3.96:95%CI (1.483, 10.586), and unmarried (AOR = 2.71, 95% CI = 1.061, 6.903) were significantly associated with balance impairment.

CONCLUSION AND RECOMMENDATION

The prevalence of balance impairment in the study was high. Being depressed, use walking aids, did not have physiotherapy treatment, abnormal speed of mobility, and unmarried were significantly associated factors. Therefore; it is better to give greater emphasis for those factors.

Does the stimulus provoking a stepping reaction correlate with step characteristics and clinical measures of balance and mobility post-stroke?

BACKGROUND

Retraining stepping reactions in people post-stroke is vital. However, the relationship between the stimulus and resulting stepping performance in people post-stroke is unknown. We explored relationships between stepping stimulus and stepping reactions initiated by either paretic or non-paretic legs of people post-stroke and controls. Relationships were examined in the context of clinical measures of balance.

METHODS

Centre of mass dynamics were measured during self-initiated destabilizing leaning stimuli that required stepping reactions by paretic and non-paretic legs of people post-stroke (n = 10) and controls (n = 10) to recover balance. Step characteristics of the first two steps of stepping reactions were measured. Correlations were calculated between clinical measures of balance and mobility and the centre of mass and step characteristics.

FINDINGS

Steps were shorter and slower with decreased centre of mass fore-aft and downward displacement and velocity when initiated by paretic and non-paretic legs compared with controls. However, increase in centre of mass displacement and velocity in the fore-aft and downward direction tended to be associated with a greater increase in step length and speed when stepping reactions were initiated by the paretic and non-paretic legs compared with controls. Time to step initiation in response to onset of falling stimulus did not differ between groups. Strong positive correlations were found between clinical balance and mobility scores and centre of mass and step dynamics in fore-aft and vertical directions.

INTERPRETATION

These results support objective measurement of centre of mass to quantify the stimulus influencing step dynamics and stepping performance during retraining interventions following stroke.

Prevalence of Balance Impairment and Factors Associated with Balance among Patients with Stroke. A Cross Sectional Retrospective Case Control Study

Stroke is a major cause of disability worldwide, and balance impairments are common disabling factors in patients with stroke, leading to falls. Thus, the study objectives were as follows: (i) To find the prevalence of balance impairment among patients with stroke. (ii) To find out the factors associated with balance impairment in patients with stroke. This cross-sectional retrospective case control study involved eighty-one post stroke patients with a mean age of 58.36 ± 14.06, recruited from six hospitals, who underwent an assessment of balance, walking speed, depression and isometric strength of the ankle and knee. These patients were later categorized into subjects with good balance (<45) in the Berg balance scale (BBS) and those with poor balance (≥45), as cases and controls, to assess the factors associated with balance impairment using binary logistic regression. The prevalence of balance impairment among patients with stroke was 48.1%. The reduction in power of knee flexors (OR = 0.858), knee extensors (OR = 0.880) and ankle dorsiflexors (OR = 0.820) was found to be significantly associated with balance impairment, along with speed (OR = 1.187 (95% CI = 1.100, 1.280)), depression (OR = 1.331 (95% CI = 1.055-1.679)) and activities of daily living (OR = 0.313 (95% CI = 0.150-0.650)). In summary, around half of the patients with stroke exhibited balance impairments, with females being more prone.