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Featured researches published by Xinliang Liu.


PLOS ONE | 2016

The Influence of Physical Therapy Guideline Adherence on Healthcare Utilization and Costs among Patients with Low Back Pain: A Systematic Review of the Literature

William J. Hanney; Michael Masaracchio; Xinliang Liu; Morey J. Kolber

Background Low back pain (LBP) is common and associated healthcare costs are significant. While clinical practice guidelines have been established in an attempt to reduce costs and healthcare utilization, it is unclear if adherence to physical therapy guidelines for those with LBP is efficacious. Therefore, the purpose of this study was to assess current evidence and evaluate the impact of physical therapy guideline adherence on subsequent healthcare costs and utilization for patients with LBP. Methods An electronic search was conducted in PubMed, CINAHL (EBSCO Host), AMED (Ovid), and PEDro. Studies included in this review were published in peer reviewed journals and the primary mode of treatment was administered by a physical therapist. Also, the definition of adherence was clearly defined based on claims data and at least one measure of cost or utilization reported. Quality assessment was evaluated via a modified Downs and Black checklist. Due to the conceptual heterogeneity in variable measurements, data were qualitatively synthesized and stratified by reported utilization and cost measures. Results A total of 256 results were identified and after omitting duplicates, 4 articles were retained, which were all retrospective in nature. Quality scores ranged between 19 and 21 points out of a possible 26 on the modified Downs and Black checklist. All identified studies used the same definition of guideline adherence, which focused on billing active codes and minimizing use of passive codes. The results demonstrated trends that, with a few exceptions, suggested those patients with LBP that were treated with an adherent guideline program demonstrated decreased healthcare utilization and an overall healthcare savings. Conclusion Preliminary evidence suggests that adherence to established clinical practice guidelines may assist with decreasing healthcare utilization and costs. Additional research based on prospective randomized controlled trials are needed to provide high quality evidence regarding the impact of guideline adherence among patients with LBP.


Physical Therapy | 2016

Utilization and Payments of Office-Based Physical Rehabilitation Services Among Individuals With Commercial Insurance in New York State

Xinliang Liu; William J. Hanney; Michael Masaracchio; Morey J. Kolber

Background Limited research exists on the utilization and payments of physical rehabilitation services, especially among individuals with commercial insurance. Objective This study aimed to characterize the utilization and payments of office-based physical rehabilitation services among nonelderly individuals with commercial insurance from New York State. Design This was a retrospective descriptive study with a cross-sectional design. Methods A cohort of 1.8 million individuals in the 2012 Truven Health MarketScan Research Database was constructed for review. A total of 109,821 unique patients who received any type of physical rehabilitation provided by physical therapists, chiropractors, and physicians in the office setting were included for analyses. Results Physical therapists provided the largest proportion of physical rehabilitation services (54.5%), followed by chiropractors (27.5%) and physicians (18.0%). Six out of 100 individuals used physical rehabilitation services in 2012. The mean annual payment of physical rehabilitation per patient was


Physical Therapy | 2018

Immediate Physical Therapy Initiation in Patients With Acute Low Back Pain Is Associated With a Reduction in Downstream Health Care Utilization and Costs

Xinliang Liu; William J. Hanney; Michael Masaracchio; Morey J. Kolber; Mei Zhao; Aaron Spaulding; Meghan Hufstader Gabriel

820 (median=


PLOS ONE | 2017

Timing of rehabilitation on length of stay and cost in patients with hip or knee joint arthroplasty: A systematic review with meta-analysis

Michael Masaracchio; William J. Hanney; Xinliang Liu; Morey J. Kolber; Kaitlin Kirker

323). Women and older individuals were more likely to use rehabilitation services and have higher annual utilization and payments. For the 5 most common physical rehabilitation services, payment rates for chiropractors were the highest and those for physical therapists were the lowest, with payment rates for physicians in between. Limitations This study was based on commercial insurance claims data from one state. Conclusions Findings from this study recognize that rehabilitation services are delivered by various types of health care professionals and the payment rates vary across provider specialties in New York State. Of particular interest is that although physical therapists provide the largest proportion of services, their payment rates are lower than the rates for chiropractors and physicians. Future research should assess regional variations and explore interprovider cost-effectiveness in delivering these interventions.


American Journal of Lifestyle Medicine | 2016

The Influence of Exercise on Perceived Pain and Disability in Patients With Lumbar Spinal Stenosis: A Systematic Review of Randomized Controlled Trials

Jarrett Slater; Morey J. Kolber; Kristen Couper Schellhase; Chetan K. Patel; Carey E. Rothschild; Xinliang Liu; William J. Hanney

Background. Physical therapy is an important treatment option for patients with low back pain (LBP). However, whether to refer patients for physical therapy and the timing of initiation remain controversial. Objective. The objective of this study was to evaluate the impact of receiving physical therapy and the timing of physical therapy initiation on downstream health care utilization and costs among patients with acute LBP. Design. The design was a retrospective cohort study. Methods. Patients who had a new onset of LBP between January 1, 2009, and December 31, 2013, in New York State were identified and grouped into different cohorts on the basis of whether they received physical therapy and the timing of physical therapy initiation. The probability of service use and LBP‐related health care costs over a 1‐year period were analyzed. Results. Among 46,914 patients with acute LBP, 40,246 patients did not receive physical therapy and 6668 patients received physical therapy initiated at different times. After controlling for patient characteristics and adjusting for treatment selection bias, health care utilization and cost measures over the 1‐year period were the lowest among patients not receiving physical therapy, followed by patients with immediate physical therapy initiation (within 3 days), with some exceptions. Among patients receiving physical therapy, those receiving physical therapy within 3 days were consistently associated with the lowest health care utilization and cost measures. Limitations. This study was based on commercial insurance claims data from 1 state. Conclusions. When referral for physical therapy is warranted for patients with acute LBP, immediate referral and initiation (within 3 days) may lead to lower health care utilization and LBP‐related costs.


Journal of Strength and Conditioning Research | 2017

Shoulder Joint and Muscle Characteristics Among Weight-training Participants with and without Impingement Syndrome.

Morey J. Kolber; William J. Hanney; Scott W. Cheatham; Paul A. Salamh; Michael Masaracchio; Xinliang Liu

Objective To investigate the role of early initiation of rehabilitation on length of stay (LOS) and cost following total hip arthroplasty, total knee arthroplasty, or unicompartmental knee arthroplasty. Data sources Electronic databases PubMed, CINAHL, Pedro, Embase, AMED, and the Cochrane Library were searched in July 2016. Five additional trials were identified through reference list scanning. Study selection Eligible studies were published in English language peer-reviewed journals; included participants that had undergone total hip arthroplasty, total knee arthroplasty, or unicompartmental knee arthroplasty reported clearly defined timing of rehabilitation onset for at least two groups; and reported at least one measure of LOS or cost. Inclusion criteria were applied by 2 independent authors, with disagreements being determined by a third author. Searching identified 1,029 potential articles, of which 17 studies with 26,614 participants met the inclusion criteria. Data extraction Data was extracted independently by 2 authors, with disagreements being determined by a third author. Methodological quality of each study was evaluated independently by 2 authors using the Downs and Black checklist. Pooled analyses were analyzed using a random-effects model with inverse variance methods to calculate standardized mean differences (SMD) and 95% confidence intervals for LOS. Data synthesis When compared with standard care, early initiation of physical therapy demonstrated a decrease in length of stay for the 4 randomized clinical trials (SMD = -1.90; 95% CI -2.76 to -1.05; I2 = 93%) and for the quasi-experimental and 5 prospective studies (SMD = -1.47; 95% CI -1.85 to -1.10; I2 = 88%). Conclusion Early initiation of rehabilitation following total hip arthroplasty, total knee arthroplasty, or unicompartmental knee arthroplasty is associated with a shorter LOS, a lower overall cost, with no evidence of an increased number of adverse reactions. Additional high quality studies with standardized methodology are needed to further examine the impact of early initiation of physical therapy among patients with joint replacement procedures.


Journal of Shoulder and Elbow Surgery | 2018

The reliability, validity, and methodologic quality of measurements used to quantify posterior shoulder tightness: a systematic review of the literature with meta-analysis

Paul A. Salamh; Xinliang Liu; Morey J. Kolber; William J. Hanney; Eric J. Hegedus

Lumbar spinal stenosis (LSS) is an increasingly prevalent condition that has major health and economic implications. While there are many options for the treatment of LSS, exercise is widely considered a first-line intervention as it is associated with reduced complications and cost as compared to more invasive options. Currently, it is not clear if exercise is an effective approach to managing pain and perceived disability in patients with symptomatic LSS. Therefore, the purpose of this systematic review is to evaluate the published literature that has investigated exercise as a primary intervention for LSS. A search was conducted in electronic databases including PubMed, PEDro, SPORTDiscus, CINAHL, and AMED using the key words lumbar spinal stenosis, exercise, physical therapy, rehabilitation, and conservative treatment. Inclusion criteria consisted of published randomized controlled trials written in English that included exercise as the primary treatment in at least one of the groups, and had reported measures of pain and disability clearly stated. The search identified 310 studies of which 5 met all the inclusion parameters. Exercise appears to be an efficacious intervention for pain, disability, analgesic intake, depression, anger, and mood disturbance among patients with LSS. Further research is needed to determine which type of exercise is the most effective in managing symptoms associated with lumbar spinal stenosis.


Journal of Strength and Conditioning Research | 2017

The Short-Term Effect of Kettlebell Swings on Lumbopelvic Pressure Pain Thresholds: A Randomized Controlled Trial

Brandon M. Keilman; William J. Hanney; Morey J. Kolber; Patrick S. Pabian; Paul A. Salamh; Carey E. Rothschild; Xinliang Liu

Abstract Kolber, MJ, Hanney, WJ, Cheatham, SW, Salamh, PA, Masaracchio, M, and Liu, X. Shoulder joint and muscle characteristics among weight-training participants with and without impingement syndrome. J Strength Cond Res 31(4): 1024–1032, 2017—Subacromial impingement syndrome (SIS) has been reported as an etiological source of shoulder pain among weight-training (WT) participants; however, a paucity of evidence exists to describe intrinsic risk factors. The purpose of this study was to investigate specific risk-related joint and muscle adaptations among WT participants identified as having SIS based on a previously validated clinical testing cluster. Fifty-five men (mean age 27.3 years) who participated in recreational WT a minimum of 2 d·wk−1 were recruited, including 24 individuals with SIS and 31 without SIS serving as controls. Active range of motion (AROM), bodyweight-adjusted strength values, and strength ratios were compared between groups. Significant differences were present as WT participants with SIS had decreased internal and external rotation AROM (p ⩽ 0.016) and decreased bodyweight-adjusted strength values of the external rotator and lower trapezius musculature (p ⩽ 0.02) when compared with WT participants without SIS. Select strength ratios were greater in the SIS group (p ⩽ 0.004) implying agonist to antagonist muscle imbalances. The impaired joint and muscle characteristics identified among WT participants with SIS are not without consequence, as they are associated with shoulder disorders in both general and athletic populations. Practical applications for these findings may reside in exercise prescription that addresses internal rotation mobility, mitigates training bias, and favors muscles responsible for stabilization, such as the external rotators and lower trapezius. Strength and conditioning professionals should consider risk-related adaptations associated with WT when prescribing upper-extremity exercises.


Journal of Back and Musculoskeletal Rehabilitation | 2017

The immediate effects of manual stretching and cervicothoracic junction manipulation on cervical range of motion and upper trapezius pressure pain thresholds

William J. Hanney; Emilio J. Puentedura; Morey J. Kolber; Xinliang Liu; Patrick S. Pabian; Scott W. Cheatham

HYPOTHESIS AND BACKGROUND Posterior shoulder tightness (PST) has been linked to numerous shoulder pathologies in both the general and athletic populations. Several methods for documenting PST have been described in the literature, which may lend to variability in clinical practice and research. The purpose of this study was to perform a systematic review with meta-analysis to investigate the reliability, validity, and methodologic quality of methods used to quantify PST. METHODS Relevant studies were assessed for inclusion, and selected studies were identified from the PubMed, Embase, Cochrane, and CINAHL (Cumulative Index to Nursing and Allied Health Literature) databases. Data were extracted from the selected studies and underwent methodologic quality assessment and meta-analysis. RESULTS The search resulted in 1006 studies identified, with 18 ultimately retained. Intrarater reliability was reported in 12 studies with a summary intraclass correlation coefficient of 0.93 (95% confidence interval, 0.90-0.95), whereas inter-rater reliability was reported in 6 studies with a summary intraclass correlation coefficient of 0.89 (95% confidence interval, 0.80-0.94). Validity was reported in 10 studies, all using internal rotation as the convergent standard, and was found to be significant in all but 1 study. CONCLUSION Current methods used to quantify PST have good reliability but are primarily limited to measures of horizontal adduction of the glenohumeral joint with scapular stabilization. Limitations in using a single measurement technique exist particularly as there may be multiple contributing factors to PST. A more comprehensive approach for quantifying PST is necessary, and suggested components include a cluster of techniques composed of horizontal adduction, internal rotation, and total glenohumeral joint range of motion.


Journal of Back and Musculoskeletal Rehabilitation | 2017

The effects of a standardized belly dance program on perceived pain, disability, and function in women with chronic low back pain

Tabitha Castrillon; William J. Hanney; Carey E. Rothschild; Morey J. Kolber; Xinliang Liu; Michael Masaracchio

Abstract Keilman, BM, Hanney, WJ, Kolber, MJ, Pabian, PS, Salamh, PA, Rothschild, CE, and Liu, X. The short-term effect of kettlebell swings on lumbopelvic pressure pain thresholds: a randomized controlled trial. J Strength Cond Res 31(11): 3001–3009, 2017—The purpose of this study was to investigate the short-term effect of kettlebell swings (KBSs) on lumbopelvic pressure pain thresholds (PPTs) in healthy adults. Sixty participants (male = 23, female = 37, mean age = 25.12 ± 2.86 years, height = 170.73 ± 9.2 cm, mass = 70.49 ± 13.32 kg) were randomized into one of 2 groups. The experimental group performed a warm-up followed by 8 consecutive 20-second rounds of KBS with 10-second rest periods. The control group performed the warm-up alone. An evaluator blinded to group assignment, assessed PPTs immediately before and after the intervention using a handheld pressure algometer. The algometer was applied to the regions of the right paravertebral (PVM), quadratus lumborum (QL), and piriformis (PF) muscles perpendicular to the skin based on standardized palpation procedures. The participants were instructed to report when sensation changed from “comfortable pressure” to “slightly unpleasant pain.” No significant group differences existed at baseline for PPTs (PVM p = 0.068; QL p = 0.134, & PF p = 0.105). Significant group by time interactions existed for each site after the interventions (PVM, p = 0.018; QL, p = 0.004; PF, p = 0.026) favoring the KBS group. Results suggest that KBSs create a reduction in muscle sensitivity to noxious pressure based on pressure algometry measurements. These findings may be due to the unique cyclic muscle contraction associated with KBSs, which has been proposed to facilitate removal of muscle metabolites. The findings of this study provide a foundation for future studies to examine the use of this type of training in patients with low back pain of a muscular etiology or postexercise muscle soreness. Furthermore, future studies should evaluate specific mechanisms for these effects.

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William J. Hanney

University of Central Florida

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Morey J. Kolber

Nova Southeastern University

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Carey E. Rothschild

University of Central Florida

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Scott W. Cheatham

California State University

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Paul A. Salamh

American Physical Therapy Association

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Mei Zhao

University of North Florida

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Patrick S. Pabian

University of Central Florida

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