Study design
This study was a retrospective cohort study. Before and after the unpredictable and long-term COVID-19 epidemic lockdown (Shanghai, April 2022 to May 2022) [16], all patients received rehabilitation assessments in Yueyang Hospital of Integrated Traditional Chinese and Western Medicine. Before the long-term lockdown, as many patients as possible were educated by doctors or therapists about the content of home exercise, and a personalized home exercise programs was tailored for each post-stroke patient based on their dysfunction. This study was approved by the Ethics Committee of Yueyang Hospital of Integrated Traditional Chinese and Western Medicine. Since this study was a retrospective cohort study, informed consent was not applicable.
First, we collected the factors that might affect the post-stroke sensorimotor dysfunction during the long-term lockdown. The evaluation indicators of post-stroke sensorimotor dysfunction before and after the long-term lockdown were recorded. Second, we analyzed the recovery effect of sensorimotor dysfunction in post-stroke patients who can only rely on home exercise during the long-term lockdown. Third, we sequentially performed univariate and multivariate Logistic regression analyses to see which factors might influence post-stroke sensorimotor dysfunction during the long-term lockdown.
Patients and Data Collection
All patients were from Yueyang Hospital of Integrated Traditional Chinese and Western Medicine and were diagnosed as stroke based on clinical assessment and neuroimaging. The onset time of all patients was more than 1 month, and patients’ disease was in a stable phase. All patients were between 30 and 70 years old. All patients had sensorimotor dysfunction after stroke (Fugl-Meyer motor score༜100 and Fugl-Meyer sensory score༜24). Of the 115 registered cases, 104 (90.4%) were considered eligible and 11 (9.6%) were excluded from the analysis. Specifically, 6 patients could not be followed up, 2 patients had recurrent stroke, and 3 patients had loss of important data (Fig. 1).
We collected all data related with factors that might affect post-stroke sensorimotor dysfunction during the long-term lockdown, including: age (years), sex, education, Body Mass Index (BMI), the course of disease (month), the condition of personalized home exercise programs, and the condition of home-based rehabilitation equipment.
Data Grouping
Age (years) was categorized into three groups [17]: ༜45 years old = 1, 45–60 years old = 2 and ༞60 years old = 3; gender was categorized into two groups: female = 0 and male = 1; education was categorized into two groups: primary school - middle School = 0 and junior college or above = 1; BMI of the Asian population was categorized into three groups [18]: ༜18.5 = 1, 18.5–24 = 2 and ༞24 = 3; the course of disease (months) was categorized into two groups [19]: 1–6 months = 0 and ༞6 months = 1; the condition of personalized home exercise programs: no = 0 and yes = 1; the condition of home-based rehabilitation equipment: almost no = 0 and partially satisfied = 1.
Evaluation indicators of post-stroke sensorimotor dysfunction
The change of Fugl–Meyer Assessment (FMA)-sensory score (No change in score or score change below 0 = 0; Score change above 0 = 1); The change of Fugl–Meyer Assessment (FMA)-motor score (No change in score or score change below 0 = 0; Score change above 0 = 1); The change of Berg Balance Scale (BBS) score (No change in score or score change below 0 = 0; Score change above 0 = 1); The change of Ability of Daily Living (ADL) score (No change in score or score change below 0 = 0; Score change above 0 = 1).
FMA is widely used in the assessment of sensorimotor function and can reflect the level of sensorimotor function in stroke patients [20]. FMA includes nine areas of sensorimotor function (A: shoulder; B: wrist; C: hand/finger; D: coordination of upper limb; E: hip/knee/ankle; F: coordination and balance of lower limbs; H: sensory; J: ROM/pain). Among them, the total score of FMA-sensory is 24 points (light touch 8, proprioception 16), and lower scores indicate worse sensory function; the total score of FMA-motor is 100 points (upper extremity 66, lower extremity 34), and lower scores indicate worse movement function. The FMA has excellent reliability and validity and is sufficiently sensitive to clinical and research practice [21].
BBS is a widely used balance scale in clinical practice, which can well reflect the balance function level of stroke patients [22]. BBS has 14 items with a full score of 56. This total score ultimately reflects the overall balance function. The higher the score, the better the balance function. Berg balance scale has good reliability, validity and sensitivity for clinical and research practice.
ADL is assessed by using the Modified Barthel index (BI), including the patient’s stool, urination, grooming, toileting, eating, transfer, walking, dressing, going up and down stairs, and bathing [23]. The total score of ADL is 100, representing self-care ability; The total score of ADL is 0, representing complete dependence. ADL can be classified as mild (61–99 points), moderate (41–60 points), and severe (1–40 points).
Statistical Analysis
The data was analyzed by SPSS25.0 software. First, we analyzed baseline characteristics of all patients to obtain an overview of the data distribution. The chi-square test was used to determine statistical differences between proportions in each group. Second, we performed univariate logistic regression analysis to assess the impacts of factors that might affect sensorimotor dysfunction after stroke during the long-term lockdown, including variables with odds ratios (ORs) with 95% confidence indexes (CIs). Third, multivariate logistic regression analyses were performed. For multivariate Logistic regression analyses, the optimal regression equation established by the Enter method has the best effect for estimation and prediction, and is applicable when the number of independent variables is small [24]. All the meaningful factors were included. P values less than 0.05 were considered statistically significant.