Andrew R. Tyser
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Andrew R. Tyser has a total of 101 co-authors. Here are the top co-authors by number of shared publications:
- Nikolas H. Kazmers
Department of Orthopaedics, University of Utah, Salt Lake City, UT
16 shared publications - Andrew R. Stephens
Department of Physical Medicine and Rehabilitation, University of Rochester Medical Center, Rochester, NY, United States
6 shared publications Angela P. Presson
University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6 shared publications- Man Hung
College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UT 84095, USA
5 shared publications Chong Zhang
Division of Public Health, University of Utah, Salt Lake City, UT
4 shared publications- Chong Zhang
Division of Epidemiology, Department of Medicine, University of Utah, Salt Lake City, Utah
4 shared publications
Latest Publications
- 12 January 2022
- Published by Elsevier in The Journal of Hand Surgery
- Vol. 47 (3) , 218-227.e2
Scaphotrapeziotrapezoid Arthrodesis: Systematic Review
- 12 January 2022
- Published by Elsevier in The Journal of Hand Surgery
- Vol. 47 (3) , 218-227.e2
Scaphotrapeziotrapezoid Arthrodesis: Systematic Review
- 1 November 2021
- Published by Elsevier in The Journal of Hand Surgery
- Vol. 46 (11) , 947-951
A Framework for Assigning Level of Evidence to Studies Using Institutional Databases
- 1 November 2021
- Published by Elsevier in The Journal of Hand Surgery
- Vol. 46 (11) , 947-951
A Framework for Assigning Level of Evidence to Studies Using Institutional Databases
- Open Access
- 1 January 2021
- Published by Elsevier in JSES International
- Vol. 5 (1) , 18-23
Evaluation of factors driving cost variation for distal humerus open reduction internal fixation
- 1 January 2021
- Published by Elsevier in JSES International
- Vol. 5 (1) , 18-23
Open AccessEvaluation of factors driving cost variation for distal humerus open reduction internal fixation
- 1 January 2021
- Published by Elsevier in Journal of Shoulder and Elbow Surgery
- Vol. 30 (1) , 158-164
Evaluating the performance of PROMIS and QuickDASH instruments in an intercollegiate Division 1 athlete population
- 1 January 2021
- Published by Elsevier in Journal of Shoulder and Elbow Surgery
- Vol. 30 (1) , 158-164
Evaluating the performance of PROMIS and QuickDASH instruments in an intercollegiate Division 1 athlete population
- 1 June 2020
- Published by Elsevier in Journal of Shoulder and Elbow Surgery
- Vol. 29 (6) , e229-e237
Evaluation of factors influencing surgical treatment costs for distal biceps rupture
- 1 June 2020
- Published by Elsevier in Journal of Shoulder and Elbow Surgery
- Vol. 29 (6) , e229-e237
Evaluation of factors influencing surgical treatment costs for distal biceps rupture
- 25 May 2020
- Published by Wolters Kluwer Health in Journal of Bone and Joint Surgery
- Vol. 102 (14) , 1280-1288
Volar Locked Plating Versus Closed Reduction and Casting for Acute, Displaced Distal Radial Fractures in the Elderly
Background: It remains unclear whether volar locked plating (VLP) yields a better functional outcome than closed reduction and casting (CRC) for elderly patients with an acute, displaced distal radial fracture. Our purpose was to conduct a systematic review and meta-analysis of randomized controlled trials comparing outcomes of VLP and CRC for elderly patients (age, ≥60 years). Methods: Multiple databases, including MEDLINE, were searched for randomized controlled trials evaluating outcomes following distal radial fracture treatment. Raw data were obtained for studies that included patients of all ages, and the elderly subgroup was included for analysis. The primary outcome was the Disabilities of the Arm, Shoulder and Hand (DASH) score at ≥1 year of follow-up. Secondary outcomes included the 3-month DASH score, range of motion, final radiographic alignment, and complications. Effect sizes for the comparison of each outcome between groups were pooled across studies using random-effects models with the inverse variance weighting method. Changes in DASH score were compared with a minimal clinically important difference (MCID) estimate of 10 to assess clinical relevance. Results: Of 2,152 screened articles, 6 were included. Demographics were similar for the 274 VLP and 287 CRC patients. DASH scores were significantly better following VLP than CRC at the time of final follow-up (12 to 24 months postoperatively; score difference, −5.9; 95% confidence interval [CI], −8.7 to −3.1) and at 3 months (−8.9; 95% CI, −13.0 to −4.8). VLP yielded significantly better palmar tilt, radial inclination, and supination, with no differences in ulnar variance, flexion-extension, pronation, or total complication rates. Conclusions: Functional outcome was significantly better following VLP than CRC 3 months into the treatment of acute, displaced distal radial fractures in an elderly population and up to 2 years after injury. However, the observed differences in the final DASH score did not exceed published estimates of the MCID, suggesting that clinical outcomes are similar for both treatment options. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.
- 25 May 2020
- Published by Wolters Kluwer Health in Journal of Bone and Joint Surgery
- Vol. 102 (14) , 1280-1288
Volar Locked Plating Versus Closed Reduction and Casting for Acute, Displaced Distal Radial Fractures in the Elderly
Background: It remains unclear whether volar locked plating (VLP) yields a better functional outcome than closed reduction and casting (CRC) for elderly patients with an acute, displaced distal radial fracture. Our purpose was to conduct a systematic review and meta-analysis of randomized controlled trials comparing outcomes of VLP and CRC for elderly patients (age, ≥60 years). Methods: Multiple databases, including MEDLINE, were searched for randomized controlled trials evaluating outcomes following distal radial fracture treatment. Raw data were obtained for studies that included patients of all ages, and the elderly subgroup was included for analysis. The primary outcome was the Disabilities of the Arm, Shoulder and Hand (DASH) score at ≥1 year of follow-up. Secondary outcomes included the 3-month DASH score, range of motion, final radiographic alignment, and complications. Effect sizes for the comparison of each outcome between groups were pooled across studies using random-effects models with the inverse variance weighting method. Changes in DASH score were compared with a minimal clinically important difference (MCID) estimate of 10 to assess clinical relevance. Results: Of 2,152 screened articles, 6 were included. Demographics were similar for the 274 VLP and 287 CRC patients. DASH scores were significantly better following VLP than CRC at the time of final follow-up (12 to 24 months postoperatively; score difference, −5.9; 95% confidence interval [CI], −8.7 to −3.1) and at 3 months (−8.9; 95% CI, −13.0 to −4.8). VLP yielded significantly better palmar tilt, radial inclination, and supination, with no differences in ulnar variance, flexion-extension, pronation, or total complication rates. Conclusions: Functional outcome was significantly better following VLP than CRC 3 months into the treatment of acute, displaced distal radial fractures in an elderly population and up to 2 years after injury. However, the observed differences in the final DASH score did not exceed published estimates of the MCID, suggesting that clinical outcomes are similar for both treatment options. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.
- 31 March 2020
- Published by Wolters Kluwer Health in Journal of the American Academy of Orthopaedic Surgeons
- Vol. 28 (24) , e1111-e1120
The Impact of Social Deprivation on Orthopaedic Outpatient Satisfaction Using the Press Ganey Outpatient Medical Practice Survey
Introduction: In orthopaedics, multiple factors (patient age, wait time, and depression) have been associated with lower Press Ganey Outpatient Medical Practice Survey (PGOMPS) patient satisfaction scores. We hypothesized that increased social deprivation is an independent predictor of lower patient satisfaction, as measured by the PGOMPS. Methods: We retrospectively reviewed unique new outpatient orthopaedic surgery visits between January 1, 2014, and December 31, 2016, at a single tertiary academic institution. Given the high ceiling effects, satisfaction was defined a priori as achieving a score above the 33rd percentile. Social deprivation was determined using the 2015 Area Deprivation Index (ADI). Univariate and multivariable binary logistic regressions were used to detect factors associated with patient satisfaction for both the PGOMPS Total Score and Provider Sub-Score. Results: Of the 4,881 included patients, the mean age was 53.3 ± 15.9 years, 59.3% were women, and mean ADI was 30.1 ± 19.2. Univariate analysis revealed a significantly decreased odds of achieving satisfaction on the Total Score for each decile increase in ADI (odds ratio [OR] 0.94; P < 0.001). Compared with the least deprived quartile, patients of the most deprived quartile were significantly less likely to report satisfaction for both the Total Score (OR 0.56; P = 0.001) and Provider Sub-Score (OR 0.63; P = 0.011). Multivariable analysis revealed that the odds of achieving satisfaction for each decile increase in ADI were 0.96 for the Total Score (P = 0.014) and 0.95 for the Provider Sub-Score (P = 0.004), independent of age, wait time, race, subspecialty, provider type, and the clinic setting. Conclusions: Increased social deprivation was an independent predictor of orthopaedic outpatient dissatisfaction on the PGOMPS. These findings should be considered when interpreting patient satisfaction scores and lend further support in an effort to improve healthcare inequalities. Level of Evidence: Level III
- 31 March 2020
- Published by Wolters Kluwer Health in Journal of the American Academy of Orthopaedic Surgeons
- Vol. 28 (24) , e1111-e1120
The Impact of Social Deprivation on Orthopaedic Outpatient Satisfaction Using the Press Ganey Outpatient Medical Practice Survey
Introduction: In orthopaedics, multiple factors (patient age, wait time, and depression) have been associated with lower Press Ganey Outpatient Medical Practice Survey (PGOMPS) patient satisfaction scores. We hypothesized that increased social deprivation is an independent predictor of lower patient satisfaction, as measured by the PGOMPS. Methods: We retrospectively reviewed unique new outpatient orthopaedic surgery visits between January 1, 2014, and December 31, 2016, at a single tertiary academic institution. Given the high ceiling effects, satisfaction was defined a priori as achieving a score above the 33rd percentile. Social deprivation was determined using the 2015 Area Deprivation Index (ADI). Univariate and multivariable binary logistic regressions were used to detect factors associated with patient satisfaction for both the PGOMPS Total Score and Provider Sub-Score. Results: Of the 4,881 included patients, the mean age was 53.3 ± 15.9 years, 59.3% were women, and mean ADI was 30.1 ± 19.2. Univariate analysis revealed a significantly decreased odds of achieving satisfaction on the Total Score for each decile increase in ADI (odds ratio [OR] 0.94; P < 0.001). Compared with the least deprived quartile, patients of the most deprived quartile were significantly less likely to report satisfaction for both the Total Score (OR 0.56; P = 0.001) and Provider Sub-Score (OR 0.63; P = 0.011). Multivariable analysis revealed that the odds of achieving satisfaction for each decile increase in ADI were 0.96 for the Total Score (P = 0.014) and 0.95 for the Provider Sub-Score (P = 0.004), independent of age, wait time, race, subspecialty, provider type, and the clinic setting. Conclusions: Increased social deprivation was an independent predictor of orthopaedic outpatient dissatisfaction on the PGOMPS. These findings should be considered when interpreting patient satisfaction scores and lend further support in an effort to improve healthcare inequalities. Level of Evidence: Level III
- 12 March 2020
- Published by Wolters Kluwer Health in Journal of Bone and Joint Surgery
- Vol. 102 (12) , 1050-1058
Risk of Total Wrist Arthrodesis or Reoperation Following 4-Corner Arthrodesis or Proximal Row Carpectomy for Stage-II SLAC/SNAC Arthritis
Background: For stage-II scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) patterns of wrist arthritis, the optimal method of surgical treatment remains unclear. Previous literature has demonstrated similar clinical outcomes between proximal row carpectomy (PRC) and 4-corner arthrodesis (FCA), making the risk of reoperation a focus of particular interest. In the present study, the primary null hypothesis was that there would be no difference in the rate of conversion to total wrist arthrodesis between PRC and FCA. Additionally, we hypothesized that the rate of secondary surgical procedures would be similar between the 2 procedures. Methods: The national Veterans Health Administration Corporate Data Warehouse was utilized to identify 2,449 patients who underwent either PRC or FCA between 1992 and 2016. With use of operative reports to identify the arthritis pattern, only cases of stage-II SLAC/SNAC were included. All complications and subsequent surgical procedures were confirmed by manual chart review. Propensity score analyses with matching weights were utilized to balance the PRC and FCA cohorts. The rates of conversion to wrist arthrodesis and secondary surgical procedures were calculated. Results: Of the 1,168 patients with stage-II SLAC/SNAC arthritis, 933 wrists underwent PRC and 257 wrists underwent FCA. Ten-year survival free of total wrist arthrodesis in the matching PRC (251 procedures) and FCA (251 procedures) cohorts was 94.3% (95% confidence interval [CI], 92.3% to 96.3%) and 94.1% (95% CI, 90.8% to 97.4%), respectively. Survival free of a secondary surgical procedure other than wrist arthrodesis was 99.7% (95% CI, 99.3% to 100.0%) for PRC and 83.5% (95% CI, 78.2% to 88.8%) for FCA. Conclusions: PRC and FCA demonstrated similarly low rates of conversion to total wrist arthrodesis. In contrast, the rate of secondary surgical procedures following FCA was significantly higher compared with PRC. Given the historically similar clinical outcomes between PRC and FCA, the results of the present study show that PRC may be a preferable treatment for stage-II SLAC/SNAC wrist arthritis. Level of Evidence: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
- 12 March 2020
- Published by Wolters Kluwer Health in Journal of Bone and Joint Surgery
- Vol. 102 (12) , 1050-1058
Risk of Total Wrist Arthrodesis or Reoperation Following 4-Corner Arthrodesis or Proximal Row Carpectomy for Stage-II SLAC/SNAC Arthritis
Background: For stage-II scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) patterns of wrist arthritis, the optimal method of surgical treatment remains unclear. Previous literature has demonstrated similar clinical outcomes between proximal row carpectomy (PRC) and 4-corner arthrodesis (FCA), making the risk of reoperation a focus of particular interest. In the present study, the primary null hypothesis was that there would be no difference in the rate of conversion to total wrist arthrodesis between PRC and FCA. Additionally, we hypothesized that the rate of secondary surgical procedures would be similar between the 2 procedures. Methods: The national Veterans Health Administration Corporate Data Warehouse was utilized to identify 2,449 patients who underwent either PRC or FCA between 1992 and 2016. With use of operative reports to identify the arthritis pattern, only cases of stage-II SLAC/SNAC were included. All complications and subsequent surgical procedures were confirmed by manual chart review. Propensity score analyses with matching weights were utilized to balance the PRC and FCA cohorts. The rates of conversion to wrist arthrodesis and secondary surgical procedures were calculated. Results: Of the 1,168 patients with stage-II SLAC/SNAC arthritis, 933 wrists underwent PRC and 257 wrists underwent FCA. Ten-year survival free of total wrist arthrodesis in the matching PRC (251 procedures) and FCA (251 procedures) cohorts was 94.3% (95% confidence interval [CI], 92.3% to 96.3%) and 94.1% (95% CI, 90.8% to 97.4%), respectively. Survival free of a secondary surgical procedure other than wrist arthrodesis was 99.7% (95% CI, 99.3% to 100.0%) for PRC and 83.5% (95% CI, 78.2% to 88.8%) for FCA. Conclusions: PRC and FCA demonstrated similarly low rates of conversion to total wrist arthrodesis. In contrast, the rate of secondary surgical procedures following FCA was significantly higher compared with PRC. Given the historically similar clinical outcomes between PRC and FCA, the results of the present study show that PRC may be a preferable treatment for stage-II SLAC/SNAC wrist arthritis. Level of Evidence: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
- Open Access
- 28 January 2020
- Published by Springer Nature in Journal of Orthopaedic Surgery and Research
- Vol. 15 (1) , 1-6
Evaluating opportunities for improved orthopedics outpatient satisfaction: an analysis of Press Ganey® Outpatient Medical Practice Survey responses
Introduction: The Press Ganey® Outpatient Medical Practice Survey (PGOMPS) is composed of 10 provider-specific and 15 non-provider-specific questions. Some healthcare systems link PGOMS overall scores to physician reimbursements. The aim of this study was to determine the frequency of patient satisfaction across individual PGOMPS question, the null hypothesis being that there was no variability between the frequency of satisfaction and similar questions.Methods: We reviewed all new patient orthopedic PGOMPS scores between January 2014 and December 2017. Due to the large ceiling effect, satisfaction was defined as a perfect total score. The frequency of perfect scores for each question was calculated.Results: Five thousand one hundred sixty-three patients met the inclusion criteria. Two thousand two hundred sixty-six (43.89%) provider-specific questions received perfect satisfaction versus 986 (19.10%) with perfect satisfaction for non-provider-specific questions (p < 0.001). The five questions most likely to receive perfect satisfaction were MD friendliness/courtesy (80.36), MD spoke using clear language (80.35%), likelihood to recommend practice (79.11%), likelihood to recommend MD (78.8%), and MD confidence (78.74%). The five least likely were convenience of office hours (60.44%), ease of getting on phone (59.72%), ability to get desired appointment (59.50%), wait time (54.63%), and information about delays (53.80%).Conclusions: Our results suggest that the majority of orthopedic patients are satisfied with their provider, demonstrating that room for improvement is limited with provider-specific areas. Leaders of health care teams should consider these results when seeking to improve patient satisfaction scores and determining how and if scores should be linked to reimbursements.
- 28 January 2020
- Published by Springer Nature in Journal of Orthopaedic Surgery and Research
- Vol. 15 (1) , 1-6
Open AccessEvaluating opportunities for improved orthopedics outpatient satisfaction: an analysis of Press Ganey® Outpatient Medical Practice Survey responses
Introduction: The Press Ganey® Outpatient Medical Practice Survey (PGOMPS) is composed of 10 provider-specific and 15 non-provider-specific questions. Some healthcare systems link PGOMS overall scores to physician reimbursements. The aim of this study was to determine the frequency of patient satisfaction across individual PGOMPS question, the null hypothesis being that there was no variability between the frequency of satisfaction and similar questions.Methods: We reviewed all new patient orthopedic PGOMPS scores between January 2014 and December 2017. Due to the large ceiling effect, satisfaction was defined as a perfect total score. The frequency of perfect scores for each question was calculated.Results: Five thousand one hundred sixty-three patients met the inclusion criteria. Two thousand two hundred sixty-six (43.89%) provider-specific questions received perfect satisfaction versus 986 (19.10%) with perfect satisfaction for non-provider-specific questions (p < 0.001). The five questions most likely to receive perfect satisfaction were MD friendliness/courtesy (80.36), MD spoke using clear language (80.35%), likelihood to recommend practice (79.11%), likelihood to recommend MD (78.8%), and MD confidence (78.74%). The five least likely were convenience of office hours (60.44%), ease of getting on phone (59.72%), ability to get desired appointment (59.50%), wait time (54.63%), and information about delays (53.80%).Conclusions: Our results suggest that the majority of orthopedic patients are satisfied with their provider, demonstrating that room for improvement is limited with provider-specific areas. Leaders of health care teams should consider these results when seeking to improve patient satisfaction scores and determining how and if scores should be linked to reimbursements.
- Open Access
- 1 January 2020
- Published by Wolters Kluwer Health in JBJS Open Access
- Vol. 5 (2) , e0080
Cost-Effectiveness Analysis Comparing Proximal Row Carpectomy and Four-Corner Arthrodesis
Background: The optimal surgical treatment for scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) remains unclear. To inform clinical decision-makers, we conducted a cost-effectiveness analysis comparing proximal row carpectomy (PRC) and four-corner arthrodesis (FCA). Methods: A Markov microsimulation model was used to compare clinical outcomes, costs, and health utilities between PRC and FCA. The model used a 10-year time horizon and a 1-month cycle length, and it was evaluated from the societal perspective. Utilities and clinical parameters including transition probabilities for debridement for infection, removal of implants, conversion to total wrist arthrodesis, revision FCA, and revision total wrist arthrodesis were obtained from published literature. Timing of complications was estimated from the literature. Direct medical costs were derived from Medicare ambulatory surgical cost data, and indirect costs for missed work due to surgical procedures and complications were included. The effectiveness outcome was quality-adjusted life years (QALYs). Probabilistic sensitivity analysis and 1-way threshold analysis for utilities were performed. Results: In the base-case model, PRC dominated FCA (i.e., PRC had lower cost and greater effectiveness). The mean (and standard deviation) for the total cost and QALYs per patient were $30,970 ± $5,931 and 8.24 ± 1.28, respectively, for PRC and $44,526 ± $11,205 and 8.23 ± 1.26, respectively, for FCA. In the probabilistic sensitivity analysis, PRC dominated FCA in 57% of the 1 million iterations. The cost-effectiveness acceptability curve indicated that PRC is the most cost-effective strategy regardless of the willingness-to-pay threshold up to $100,000/QALY. Conclusions: PRC dominated FCA in the base-case analysis and in the probabilistic sensitivity analysis. These results suggest that PRC is the optimal strategy for Stage-I or II SLAC and for SNAC in patients ≥55 years of age. Level of Evidence: Economic Level IV. See Instructions for Authors for a complete description of levels of evidence.
- 1 January 2020
- Published by Wolters Kluwer Health in JBJS Open Access
- Vol. 5 (2) , e0080
Open AccessCost-Effectiveness Analysis Comparing Proximal Row Carpectomy and Four-Corner Arthrodesis
Background: The optimal surgical treatment for scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) remains unclear. To inform clinical decision-makers, we conducted a cost-effectiveness analysis comparing proximal row carpectomy (PRC) and four-corner arthrodesis (FCA). Methods: A Markov microsimulation model was used to compare clinical outcomes, costs, and health utilities between PRC and FCA. The model used a 10-year time horizon and a 1-month cycle length, and it was evaluated from the societal perspective. Utilities and clinical parameters including transition probabilities for debridement for infection, removal of implants, conversion to total wrist arthrodesis, revision FCA, and revision total wrist arthrodesis were obtained from published literature. Timing of complications was estimated from the literature. Direct medical costs were derived from Medicare ambulatory surgical cost data, and indirect costs for missed work due to surgical procedures and complications were included. The effectiveness outcome was quality-adjusted life years (QALYs). Probabilistic sensitivity analysis and 1-way threshold analysis for utilities were performed. Results: In the base-case model, PRC dominated FCA (i.e., PRC had lower cost and greater effectiveness). The mean (and standard deviation) for the total cost and QALYs per patient were $30,970 ± $5,931 and 8.24 ± 1.28, respectively, for PRC and $44,526 ± $11,205 and 8.23 ± 1.26, respectively, for FCA. In the probabilistic sensitivity analysis, PRC dominated FCA in 57% of the 1 million iterations. The cost-effectiveness acceptability curve indicated that PRC is the most cost-effective strategy regardless of the willingness-to-pay threshold up to $100,000/QALY. Conclusions: PRC dominated FCA in the base-case analysis and in the probabilistic sensitivity analysis. These results suggest that PRC is the optimal strategy for Stage-I or II SLAC and for SNAC in patients ≥55 years of age. Level of Evidence: Economic Level IV. See Instructions for Authors for a complete description of levels of evidence.