Tag: statistics

Arthrosc Sports Med Rehabil. 2021 Oct 30;3(6):e1819-e1825. doi: 10.1016/j.asmr.2021.08.009. eCollection 2021 Dec.

ABSTRACT

PURPOSE: To clinically evaluate patients who underwent a biologic augmentation technique in revision arthroscopic rotator cuff repair using an autologous fibrin scaffold and concentrated stem cells isolated from bone marrow aspirate (BMA) obtained from the proximal humerus.

METHODS: This is a retrospective review of prospectively collected data from patients who underwent biologic augmentation of revision arthroscopic rotator cuff repair using an autologous fibrin scaffold and BMA obtained from the proximal humerus between 2014 and 2015. Minimum follow-up was 12 months. Outcome measures were collected preoperatively and postoperatively including range of motion as well as American Shoulder and Elbow Surgeons Shoulder Form, Simple Shoulder Test, single assessment numeric evaluation, and visual analog score. In addition, BMA samples of each patient were assessed for the number of nucleated cells and colony-forming units. Regression analysis was performed to investigate whether the number of nucleated cells and colony-forming units had an influence on outcome and failure.

RESULTS: Ten patients who underwent biologic augmentation of revision arthroscopic rotator cuff repair using an autologous fibrin scaffold and concentrated BMA obtained from the proximal humerus between 2014 and 2015 were included. The mean follow-up time was 30.7 (range: 12-49) months. Four patients were revised at final follow-up. Postoperative clinical scores improved significantly: American Shoulder and Elbow Surgeons (28.1 ± 5.4 to 60.9 ± 9.0; P < .01), single assessment numeric evaluation (6.6 ± 2.3 to 65.1 ± 10.9; P < .01), visual analog scale (7.2 ± 0.9 to 3.1 ± 0.9; P < .01), and Simple Shoulder Test (1.6 ± 0.5 to 10.3 ± 5.7; P < .01). Postoperative range of motion increased significantly with regard to flexion (97.0 ± 13.6 to 151.0 ± 12.2; P < .01) and abduction (88.0 ± 14.0 to 134.0 ± 15.1; P = .038) but not with external rotation (38.0 ± 5.7 to 50.5 ± 6.5; P = .16). Less pain was correlated to an increased number of nucleated cells (P = .026); however, there was no correlation between failure rate and number of nucleated cells (P = .430).

CONCLUSIONS: Patients who underwent biologic augmentation of revision arthroscopic rotator cuff repair using an autologous fibrin scaffold and concentrated BMA demonstrated a significant improvement in shoulder function along with reduction of pain. However, the overall revision rate for this procedure was 40%.

LEVEL OF EVIDENCE: Level IV, therapeutic case series.

PMID:34977636 | PMC:PMC8689277 | DOI:10.1016/j.asmr.2021.08.009

Arthrosc Sports Med Rehabil. 2021 Nov 23;3(6):e1835-e1842. doi: 10.1016/j.asmr.2021.08.011. eCollection 2021 Dec.

ABSTRACT

PURPOSE: To report the functional and radiologic outcomes of meniscal repair healing in a cohort of patients with a high demand for loaded extreme flexion angles after undergoing meniscal repair.

METHODS: We performed a retrospective clinical and radiologic evaluation of patients who perform extreme knee flexion activities on a daily basis at a minimum follow-up of 2 years after meniscal repair. International Knee Documentation Committee, Lysholm, and Tegner scores were obtained, and clinical examinations and radiologic (magnetic resonance imaging and radiography) evaluations were performed.

RESULTS: Of 47 eligible patients, 39 patients (40 knees) were available for review with an average follow-up time of 5 years (range, 2-9 years). The average age was 26.7 years (range, 19-39 years); 38 patients were men. The average time from injury to surgery was 20.9 months (range, 3 days to 120 months). Associated anterior cruciate ligament injury was present in 31 knees, but only 20 underwent simultaneous anterior cruciate ligament surgery. The mean International Knee Documentation Committee score was 88.9 (range, 53-99). The mean Lysholm score was 90.9 (range, 48-100). The mean Tegner activity level dropped from 6.18 before injury to 5.51 at the time of evaluation. According to the Barrett criteria for clinical outcomes, complete healing was observed in 29 of 40 knees (72.5%). There was a statistically significant correlation between the functional outcomes and the clinical outcomes (P = .008). On magnetic resonance imaging, 22 of 38 knees (57.9%) showed completely healed menisci.

CONCLUSIONS: The results of this study suggest that loaded deep knee flexion may be safe after a period of restricted rehabilitation, and clinical and radiologic tissue healing is independent of the overall functional outcome.

LEVEL OF EVIDENCE: Level IV, case series with subgroup analysis.

PMID:34977638 | PMC:PMC8689273 | DOI:10.1016/j.asmr.2021.08.011

Arthrosc Sports Med Rehabil. 2021 Sep 15;3(6):e1803-e1810. doi: 10.1016/j.asmr.2021.08.007. eCollection 2021 Dec.

ABSTRACT

PURPOSE: To investigate the biomechanical effect of a glenolabral articular disruption (GLAD) lesion on glenohumeral laxity.

METHODS: Human cadaveric glenoids (n = 10) were excised of soft tissue, including the labrum to focus on the biomechanical effects of osteochondral surfaces. Glenohumeral dislocations were performed in a robotic test setup, while displacement forces and three-dimensional morphometric properties were measured. The stability ratio (SR), a biomechanical characteristic for glenohumeral stability, was used as an outcome parameter, as well as the path of least resistance, determined by a hybrid robot displacement. The impacts of chondral and bony defects were analyzed related to the intact glenoid. Statistical comparison of the defect states on SR and the path of least resistance was performed using repeated-measures ANOVA and Tukey’s post hoc test for multiple comparisons (P < .05). The relationship between concavity depth and SR was approximated in a nonlinear regression.

RESULTS: The initial SR of the intact glenoid (28.3 ± 7.8%) decreased significantly by 4.7 ± 3% in case of a chondral defect (P = .002). An additional loss of 3.2 ± 2.3% was provoked by a 20% bony defect (P = .004). The path of least resistance was deflected significantly more inferiorly by a GLAD lesion (2.9 ± 1.8°, P = .002) and even more by a bony defect (2.5 ± 2.9°, P = .002). The nonlinear regression with concavity depth as predictor for the SR resulted in a high correlation coefficient (r = .81).

CONCLUSIONS: Chondral integrity is an important contributor to the SR. Chondral defects as present in GLAD lesions may cause increased laxity, influence the humeral track on the glenoid during dislocation, and represent a biomechanical risk factor for a recurrent instability.

CLINICAL RELEVANCE: Cartilage deficiency corresponding to GLAD lesions may be a risk factor for impaired surgical outcomes.

PMID:34977634 | PMC:PMC8689271 | DOI:10.1016/j.asmr.2021.08.007

Arthrosc Sports Med Rehabil. 2021 Sep 11;3(6):e1599-e1606. doi: 10.1016/j.asmr.2021.07.015. eCollection 2021 Dec.

ABSTRACT

PURPOSE: To review the relative accuracy of preoperative magnetic resonance imaging (MRI) and fluoroscopically guided examination-under-sedation (EUS) findings and to explore the validity of the anterior acetabular sector angle (AASA) as a radiologic MRI-based marker of anterior acetabular coverage in pincer-type impingement.

METHODS: A cohort of 150 consecutive patients undergoing primary hip arthroscopy for femoroacetabular impingement (FAI) in 2018 to 2019 was reviewed. The inclusion criteria were pure FAI unilateral symptomatic pathology and the availability of complete data sets (MRI, EUS, and intraoperative records). Preoperative MRI and EUS findings were compared with gold-standard intraoperative arthroscopic findings, specifically evaluating the alpha angle in the presence of cam lesions, AASA in the presence of pincer lesions, as well as soft-tissue lesions. An alpha angle greater than 50° and an AASA greater than 65° were deemed pathologic.

RESULTS: The patient cohort included 78 women and 72 men with an average age of 38 years (range, 18-53 years). Intraoperatively, pincer lesions were present in 20% of patients; cam lesions, 26%; and mixed impingement, 54%. MRI versus EUS correctly identified pincer lesions in 36% versus 89% of cases and identified cam lesions in 44% versus 77% of cases. MRI findings characterizing labral tears and articular cartilage pathology were accurate in 80% and 10% of cases, respectively. Although there was no difference in the AASA between pure pincer- and mixed-type impingements (62° and 63°, respectively; P = .62), there was a statistically significant difference in reported AASA values between pure cam-type impingement and impingement involving the presence of pincer lesions (57° and 63°, respectively; P = .03). Furthermore, 31% of patients with intraoperatively identified pincer lesions had an AASA of 60° to 65°.

CONCLUSIONS: Fluoroscopic EUS is accurate in characterizing FAI pathology. In addition, MRI is useful to diagnose or rule out non-FAI pathology, ascertain labral pathology, and outline hip alignment. These methods of preoperative planning are complementary.

LEVEL OF EVIDENCE: Level IV, therapeutic case series.

PMID:34977611 | PMC:PMC8689150 | DOI:10.1016/j.asmr.2021.07.015

Arthrosc Sports Med Rehabil. 2021 Aug 31;3(6):e1729-e1736. doi: 10.1016/j.asmr.2021.07.032. eCollection 2021 Dec.

ABSTRACT

PURPOSE: To compare the long-term oncological outcome of minimally invasive curettage (MIC) with conventional open curettage (OC).

METHODS: We studied patients with primary giant cell tumor of bone (GCTB) of extremities who underwent intralesional tumor curettage and cementation and perioperative bisphosphonates from February 2003 to June 2016. All cases were histology-confirmed diagnoses of GCTB. Recurrent GCTB, malignant GCTB, cases in the axial skeleton (pelvis and spine), or cases with bone grafting of the curetted cavity were excluded. The local recurrence-free (LR-free) estimates of the OC and MIC groups were compared. The hazard ratio of a local recurrence was calculated for the various factors of the patients, disease, and treatment.

RESULTS: At a mean follow-up of 8.8 years, the overall LR rate was 24.2% (8 out of 33 patients). There was no statistical difference in LR in MIC and OC groups (27.8 % vs 20%; P = .6). The mean time to LR was 33.1 months (8 to 75). The operative time was comparable in both MIC and OC groups. None of the risk factors studied led to a significantly higher hazard of LR.

CONCLUSIONS: At a long-term follow-up of 9 years, MIC showed similar LR-free survival to OC. Combining bisphosphonates and MIC with a less invasive approach showed reasonable LR-free survival in long-term follow-up.

LEVEL OF EVIDENCE: Level III, retrospective cohort study.

PMID:34977627 | PMC:PMC8689217 | DOI:10.1016/j.asmr.2021.07.032

Korean J Parasitol. 2021 Dec;59(6):625-634. doi: 10.3347/kjp.2021.59.6.625. Epub 2021 Dec 22.

ABSTRACT

Based on the field investigations in 91 investigation sites (counties) in southwest China between 2001 and 2019, the present paper reported the chigger mites on A. agrarius mice in southwest China for the first time by using a series of statistical methods. From 715 striped field mice captured in 28 of 91 investigated sites, only 255 chiggers were collected, and they were identified as 14 species, 6 genera in 3 subfamilies under 2 families. Of 715 A. agrarius mice, only 24 of them were infested with chigger mites with low overall prevalence (PM=3.4%), overall mean abundance (MA=0.36 mites/host) and overall mean intensity (MI=10.63 mites/host). The species diversity and infestation of chiggers on A. agrarius were much lower than those previously reported on some other rodents in southwest China. On a certain species of rodent, A. agrarius mouse in southwest China seems to have a very low susceptibility to chigger infestations than in other geographical regions. Of 14 chigger species, there were 3 dominant species, Leptotrombidium sialkotense, L. rupestre and Schoengastiella novoconfuciana, which were of aggregated distribution among different individuals of A. agrarius hosts. L. sialkotense, one of 6 main vectors of scrub typhus in China, was the first dominant on A. agrarius. The species similarity of chigger mites on male and female hosts was low with CSS=0.25, and this reflects the sex-bias of different genders of A. agrarius mice in harboring different chigger species.

PMID:34974669 | DOI:10.3347/kjp.2021.59.6.625

J Pak Med Assoc. 2021 Oct;71(10):2415-2419.

ABSTRACT

Couple Years of Protection (CYP) is a proxy indicator for birth control protection. Using data from Pakistan Bureau of Statistics, spatial distribution of CYP percent change from 2015-2016 with 2016-2017 was compared by district for Population Welfare Departments, Health departments, and Lady Health Workers in the Punjab province. Spatial profile of CYP showed discernable differences by the three service providers. Local indicators of spatial autocorrelation showed significant districts by type of spatial autocorrelation including high-high, low-low, spatial clusters, as well as spatial outliers. The three service providers had different profile of clusters for percentage change from 2016 to 2017. Cluster and significance maps depict districts where CYP percent change is statistically significantly different or same from the neighbouring districts, and as such underscoring districts where additional focus on service delivery in terms of contraceptives provision could yield improved outcomes.

PMID:34974581

Anesth Pain Med (Seoul). 2021 Dec 31. doi: 10.17085/apm.21056. Online ahead of print.

ABSTRACT

BACKGROUND: We aimed to explore the distribution of intraoperative lactic acid (LA) level during liver transplantation (LT) and determine the optimal cutoff values to predict post-LT 30-day and 90-day mortality.

METHODS: Intraoperative LA data from 3,338 patients were collected between 2008 to 2019 and all-cause mortalities within 30 and 90 days were retrospectively reviewed. Of the three LA levels measured during preanhepatic, anhepatic, and neohepatic phase of LT, the peak LA level was selected to explore the distribution and predict early post-LT mortality. To determine the best cutoff values of LA, we used a classification and regression tree algorithm and maximally selected rank statistics with the smallest P value.

RESULTS: The median intraoperative LA level was 4.4 mmol/L (range: 0.5-34.7, interquartile range: 3.0-6.2 mmol/L). Of the 3,338 patients, 1,884 (56.4%) had LA levels > 4.0 mmol/L and 188 (5.6%) had LA levels > 10 mmol/L. Patients with LA levels > 16.7 mmol/L and 13.5-16.7 mmol/L showed significantly higher 30-day mortality rates of 58.3% and 21.2%, respectively. For the prediction of the 90-day mortality, 8.4 mmol/L of intraoperative LA was the best cutoff value.

CONCLUSIONS: Approximately 6% of the LT recipients showed intraoperative hyperlactatemia of > 10 mmol/L during LT, and those with LA > 8.4 mmol/L were associated with significantly higher early post-LT mortality.

PMID:34974648 | DOI:10.17085/apm.21056

J Pak Med Assoc. 2021 Oct;71(10):2330-2334. doi: 10.47391/JPMA.01-107.

ABSTRACT

OBJECTIVE: To compare the characteristics of connective tissue disease-associated interstitial lung disease with idiopathic pulmonary fibrosis at a tertiary care hospital.

METHODS: The retrospective study was conducted at the Aga Khan University Hospital, Karachi, and comprised demographical, clinical and radiological data of patients with interstitial lung disease between October 2016 and October 2017 accessed through the outpatient data registry. Data was compared in terms of characteristics and key features of patients with connective tissue disease-associated interstitial lung disease with those of idiopathic pulmonary fibrosis. Statistical analysis was done using STATA 12.

RESULTS: Of the 184 patients, 52(29.3%) had connective tissue disease-associated interstitial lung disease and 62(35%) had idiopathic pulmonary fibrosis. The most prevalent conditions among connective tissue disease-associated interstitial lung disease patients were rheumatoid arthritis 22(42.3%) and scleroderma 13(25%). Compared to patients with idiopathic pulmonary fibrosis, those with connective tissue disease-associated interstitial lung disease were predominantly younger (p<0.001) and female (p<0.001). History of gastroesophageal reflux disease was also significantly lower in connective tissue disease-associated interstitial lung disease (p=0.05).

CONCLUSIONS: Connective tissue disease-associated interstitial lung disease patients were found to be younger and predominantly female compared to patients of idiopathic pulmonary fibrosis.

PMID:34974565 | DOI:10.47391/JPMA.01-107

Clin J Pain. 2021 Dec 31. doi: 10.1097/AJP.0000000000001017. Online ahead of print.

ABSTRACT

OBJECTIVES: First, we aimed to determine the feasibility of virtual reality (VR) distraction for children with cancer undergoing subcutaneous port (SCP) access. Second, we aimed to estimate preliminary treatment effects of VR compared to an active distraction control (iPad).

METHODS: A single-site pilot randomized controlled trial (RCT) comparing VR to iPad distraction was conducted. Eligible children were aged 8-18 years undergoing treatment for cancer with upcoming SCP needle insertions. Intervention acceptability was evaluated by child, parent, and nurse self-report. Preliminary effectiveness outcomes included child-reported pain intensity, distress, and fear. Preliminary effectiveness was determined using logistic regression models with outcomes compared between groups using pre-procedure scores as covariates.

RESULTS: Twenty participants (mean age 12▒y) were randomized to each group. The most common diagnosis was acute lymphocytic leukemia (n=23, 58%). Most eligible children (62%) participated, and one withdrew after randomization to the iPad group. Nurses, parents, and children reported the interventions in both groups to be acceptable, with the VR participants reporting significantly higher immersion in the distraction environment (P=0.0318). Although not statistically significant, more VR group participants indicated no pain (65% vs. 45%) and no distress (80% vs. 47%) during the procedure compared to the iPad group. Fear was similar across groups, with approximately 60% of the sample indicating no fear.

DISCUSSION: VR was feasible and acceptable to implement as an intervention during SCP access. Preliminary effectiveness results indicate that VR may reduce distress and distress compared to iPad distraction. These data will inform design of a future full-scale RCT.

PMID:34974512 | DOI:10.1097/AJP.0000000000001017