Derrick Knapik

2024

A Systematic Review of Adverse Events and Complications After Isolated Posterior Medial Meniscus Root Repairs

Jackson, G. R., Warrier, A. A., Wessels, M., Khan, Z. A., Obioha, O., McCormick, J. R., Kaplan, D. J., Mameri, E. S., Knapik, D. M., Verma, N. N. & Chahla, J., Mar 2024, In: American Journal of Sports Medicine. 52, 4, p. 1109-1115 7 p.

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Blood Flow Restriction Enhances Recovery After Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Gopinatth, V., Garcia, J. R., Reid, I. K., Knapik, D. M., Verma, N. N. & Chahla, J., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Article › peer-review

ChatGPT-3.5 Responses Require Advanced Readability for the General Population and May Not Effectively Supplement Patient-Related Information Provided by the Treating Surgeon Regarding Common Questions About Rotator Cuff Repair

Eng, E., Mowers, C., Sachdev, D., Yerke-Hansen, P., Jackson, G. R., Knapik, D. M. & Sabesan, V. J., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Clinical outcomes, return to sport, and complications after isolated primary Latarjet versus Latarjet as a revision procedure: A systematic review and meta-analysis

Jackson, G. R., Tuthill, T., Asif, S., DeWald, D., Wessels, M., McCormick, J. R., Mameri, E. S., Knapik, D. M., Familiari, F., Hevesi, M., Batra, A. K., Chahla, J. & Verma, N. N., May 2024, In: Orthopaedics and Traumatology: Surgery and Research. 110, 3, 103810.

Research output: Contribution to journal › Review article › peer-review

Open Access

Correction to: Current Concepts in Anterior Tibial Closing Wedge Osteotomies for Anterior Cruciate Ligament Deficient Knees (Current Reviews in Musculoskeletal Medicine, (2021), 14, 6, (485-492), 10.1007/s12178-021-09729-0)

Vadhera, A. S., Knapik, D. M., Gursoy, S., Farivar, D., Perry, A. K., Cole, B. J. & Chahla, J., Oct 2024, In: Current Reviews in Musculoskeletal Medicine. 17, 10, p. 434 1 p.

Research output: Contribution to journal › Comment/debate

Open Access

Correlation between articular cartilage status on outcomes and survivorship following meniscal allograft transplantation: A systematic review

Gopinatth, V., Warrier, A. A., Jawanda, H. S., Mameri, E. S., Khan, Z. A., Allahabadi, S., Knapik, D. M., Cole, B. J. & Chahla, J., Mar 2024, In: Knee Surgery, Sports Traumatology, Arthroscopy. 32, 3, p. 623-635 13 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Degenerative Meniscus Tears Treated Nonoperatively With Platelet-Rich Plasma Yield Variable Clinical and Imaging Outcomes: A Systematic Review

Gopinatth, V., Batra, A. K., Chahla, J., Smith, M. V., Matava, M. J., Brophy, R. H. & Knapik, D. M., Apr 2024, In: Arthroscopy, Sports Medicine, and Rehabilitation. 6, 2, 100916.

Research output: Contribution to journal › Review article › peer-review

Open Access

1 Scopus citations

Hip and Pelvis Movement Patterns in Patients With Femoroacetabular Impingement Syndrome Differ From Controls and Change After Hip Arthroscopy During a Step-Down Pivot-Turn Task

Alter, T. D., Wichman, D. M., Fenn, T. W., Knapik, D. M., Espinoza Orias, A., Nho, S. J. & Malloy, P., Jan 2024, In: Orthopaedic Journal of Sports Medicine. 12, 2

Research output: Contribution to journal › Article › peer-review

Open Access

Hip Arthroscopy Patients With Lower Back Pain Show Delayed Clinical Improvement and Inferior Time-Dependent Survivorship: A Propensity Matched Study at Mid-Term Follow-Up

Kazi, O., Jan, K., Vogel, M. J., Wright-Chisem, J., Danilkowicz, R. M., Knapik, D. M. & Nho, S. J., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Isolated Primary Latarjet Procedures for Anterior Shoulder Instability Results in High Rates of Graft Resorption and Glenohumeral Degenerative Changes With Low Rates of Failure at a Minimum 2-Year Follow-Up: A Systematic Review

Jackson, G. R., Brusalis, C. M., Schundler, S. F., Sachdev, D., Obioha, O. A., McCormick, J. R., Mameri, E. S., Kaplan, D. J., Knapik, D. M., Chahla, J. & Verma, N. N., Feb 2024, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 40, 2, p. 581-591.e1

Research output: Contribution to journal › Review article › peer-review

5 Scopus citations

Meniscal Radial Tears: A Classification System Based on Tear Morphology

Chahla, J., Knapik, D. M., Jawanda, H., Allende, F., Rivarola, H., McCormick, J. R., LaPrade, R. F. & Jackson, G. R., Mar 2024, In: Arthroscopy Techniques. 13, 3, 102888.

Research output: Contribution to journal › Article › peer-review

Open Access

2 Scopus citations

Most Anterior Cruciate Ligament Injuries in Professional Athletes Occur Without Contact to the Injured Knee: A Systematic Review of Video Analysis Studies

Gopinatth, V., Smith, M., Matava, M. J., Brophy, R. H. & Knapik, D. M., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Review article › peer-review

Non-anatomical reconstruction of chronic posterolateral corner knee injuries show failure rates from 0% to 36% versus 4.3% to 24.2% for anatomic reconstruction techniques: An updated systematic review reflecting the 2019 expert consensus statement

Jackson, G. R., Mameri, E. S., Condon, J., DeWald, D., Batra, A., Salazar, L. M., Familiari, F., Matava, M., Knapik, D. M., Verma, N. N., LaPrade, R. F. & Chahla, J., Jun 2024, In: Journal of ISAKOS. 9, 3, p. 362-370 9 p.

Research output: Contribution to journal › Review article › peer-review

Open Access

1 Scopus citations

No significant difference in thick versus thin osteochondral flap trochleoplasty in the treatment of trochlear dysplasia: A systematic review

Eikani, C., Knapik, D. M., Vadhera, A. S., Singh, H., Polce, E., Gursoy, S., Yanke, A. B. & Chahla, J., May 2024, In: Knee Surgery, Sports Traumatology, Arthroscopy. 32, 5, p. 1168-1178 11 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Reported Anterior Cruciate Ligament Injury Incidence in Adolescent Athletes Is Greatest in Female Soccer Players and Athletes Participating in Club Sports: A Systematic Review and Meta-analysis

Childers, J., Eng, E., Lack, B., Lin, S., Knapik, D. M., Kaplan, D. J., Jackson, G. R. & Chahla, J., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Ulnar Collateral Ligament Reconstruction Is Commonly Performed Using a Palmaris Graft and Provides Favorable Patient Outcomes With Variable Return-to-Play and Postoperative Complication Rates: A Systematic Review

Jackson, G. R., Mowers, C. C., Sachdev, D., Knapik, D. M., Lapica, H. & Sabesan, V. J., 2024, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Review article › peer-review

2023

Acellular Dermal Allograft and Tensor Fascia Lata Autograft Show Similar Patient Outcome Improvement and High Rates of Complications and Failures at a Minimum 2-Year Follow-Up: A Systematic Review

Jackson, G. R., Tuthill, T., Schundler, S. F., Condon, J. J., Salazar, L. M., Nwiloh, M., Kaplan, D. J., Brusalis, C. M., Khan, Z. A., Knapik, D. M., Chahla, J., Cole, B. J. & Verma, N. N., May 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 5, p. 1310-1319.e2

Research output: Contribution to journal › Review article › peer-review

7 Scopus citations

Adverse Events and Complications After Primary ACL Reconstruction With Quadriceps Tendon Autograft: A Systematic Review

Jackson, G. R., Mameri, E. S., Tuthill, T., Wessels, M., Asif, S., Sugrañes, J., Batra, A. K., McCormick, J. R., Obioha, O. A., Kaplan, D. J., Knapik, D. M., Verma, N. N. & Chahla, J., Dec 2023, In: Orthopaedic Journal of Sports Medicine. 11, 12

Research output: Contribution to journal › Review article › peer-review

Open Access

2 Scopus citations

Biceps Tenodesis in Patients Age 35 Years and Younger Yields Favorable Clinical Outcomes With Variable Rates of Return to Sport and Complications: A Systematic Review

Jackson, G. R., Tuthill, T., Allahabadi, S., Brusalis, C. M., Kaplan, D. J., Rea, P., Sugrañes, J., Obioha, O., Knapik, D. M., Chahla, J. & Verma, N. N., Mar 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 3, p. 830-837 8 p.

Research output: Contribution to journal › Review article › peer-review

2 Scopus citations

Clinical and Magnetic Resonance Imaging Outcomes After Microfracture Treatment With and Without Augmentation for Focal Chondral Lesions in the Knee: A Systematic Review and Meta-analysis

Fortier, L. M., Knapik, D. M., Dasari, S. P., Polce, E. M., Familiari, F., Gursoy, S. & Chahla, J., Jul 2023, In: American Journal of Sports Medicine. 51, 8, p. 2193-2206 14 p.

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Common Sports Infectious Disease

Raji, Y., Knapik, D. M., Schroeder, A. N. & Voos, J. E., Aug 2023, In: HSS Journal. 19, 3, p. 351-357 7 p.

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Complication Rates After Medial Patellofemoral Ligament Reconstruction Range From 0% to 32% With 0% to 11% Recurrent Instability: A Systematic Review

Jackson, G. R., Tuthill, T., Gopinatth, V., Mameri, E. S., Jawanda, H., Sugrañes, J., Asif, S., Wessels, M., McCormick, J. R., Kaplan, D. J., Yanke, A. B., Knapik, D. M., Verma, N. N. & Chahla, J., May 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 5, p. 1345-1356 12 p.

Research output: Contribution to journal › Review article › peer-review

18 Scopus citations

Consistent Indications and Good Outcomes Despite High Variability in Techniques for Two-Stage Revision Anterior Cruciate Ligament Reconstruction: A Systematic Review

Gopinatth, V., Casanova, F. J., Knapik, D. M., Mameri, E. S., Jackson, G. R., Khan, Z. A., McCormick, J. R., Yanke, A. B., Cole, B. J. & Chahla, J., 2023, (Accepted/In press) In: Arthroscopy - Journal of Arthroscopic and Related Surgery.

Research output: Contribution to journal › Review article › peer-review

5 Scopus citations

Global variations in treatment and outcomes reported for anterior shoulder instability: a systematic review of the literature

Knapik, D. M., Kuhn, A. W., Ganapathy, A., Gibian, J. T., Yaeger, L. H., Matava, M. J., Smith, M. V. & Brophy, R. H., Nov 2023, In: JSES Reviews, Reports, and Techniques. 3, 4, p. 469-476 8 p.

Research output: Contribution to journal › Review article › peer-review

Open Access

Higher success rate observed in reconstruction techniques of acute posterolateral corner knee injuries as compared to repair: an updated systematic review

Fortier, L. M., Knapik, D. M., Condon, J. J., DeWald, D., Khan, Z., Kerzner, B., Matava, M. J., LaPrade, R. & Chahla, J., Dec 2023, In: Knee Surgery, Sports Traumatology, Arthroscopy. 31, 12, p. 5565-5578 14 p.

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Increase in Deltoid Compartment Pressures Immediately After Arthroscopic Rotator Cuff Repair Does Not Significantly Affect Postoperative Opioid Consumption

Knapik, D. M., Tanenbaum, J. E., Salata, M. J., Victoroff, B. N., Voos, J. E. & Gillespie, R. J., Aug 2023, In: Arthroscopy, Sports Medicine, and Rehabilitation. 5, 4, 100760.

Research output: Contribution to journal › Article › peer-review

Open Access

Isolated, Full-Thickness Proximal Rectus Femoris Injury in Competitive Athletes: A Systematic Review of Injury Characteristics and Return to Play

Knapik, D. M., Alter, T. D., Ganapathy, A., Smith, M. V., Brophy, R. H. & Matava, M. J., Jan 2023, In: Orthopaedic Journal of Sports Medicine. 11, 1

Research output: Contribution to journal › Review article › peer-review

Open Access

1 Scopus citations

Isolated, Proximal Tibiofibular Injuries in Athletic Patients: A Critical Analysis Review

Knapik, D. M., Gopinatth, V., Jackson, G. R., LaPrade, R. F., Chahla, J., Brophy, R. H., Matava, M. J. & Smith, M. V., 2023, (Accepted/In press) In: Journal of Knee Surgery.

Research output: Contribution to journal › Article › peer-review

Isolated Posterior Lateral Meniscofemoral Ligament Tears Show Greater Meniscal Extrusion in Knee Extension, and Isolated Posterior Lateral Meniscal Root Tears Show Greater Meniscal Extrusion at 30° Using Ultrasound: A Cadaveric Study

Farivar, D., Knapik, D. M., Vadhera, A. S., Condron, N. B., Hevesi, M., Shewman, E. F., Ralls, M., White, G. M. & Chahla, J., Aug 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 8, p. 1827-1837.e2

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Knee Extensor Mechanism Complications After Autograft Harvest in ACL Reconstruction: A Systematic Review and Meta-analysis

Trasolini, N. A., Lan, R., Bolia, I. K., Hill, W., Thompson, A. A., Mayfield, C. K., Knapik, D. M., Cole, B. J. & Weber, A. E., Jul 2023, In: Orthopaedic Journal of Sports Medicine. 11, 7

Research output: Contribution to journal › Review article › peer-review

Open Access

5 Scopus citations

Lateral meniscus posterior root repair in the setting of anterior cruciate ligament reconstruction restores joint mechanics to the intact state and improves clinical function: a systematic review of biomechanical and clinical outcomes

Perry, A. K., Knapik, D. M., Maheshwer, B., Polce, E. M., Hodakowski, A. J., Jackson, G., Gursoy, S. & Chahla, J., Oct 2023, In: Knee Surgery, Sports Traumatology, Arthroscopy. 31, 10, p. 4474-4484 11 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Lateral Patellofemoral Ligament Reconstruction: A Biomechanical Comparison of 2 Techniques

Huddleston, H. P., Shewman, E. F., Knapik, D. & Yanke, A. B., Feb 2023, In: American Journal of Sports Medicine. 51, 2, p. 446-452 7 p.

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Medial Collateral Ligament Reconstruction and Repair Show Similar Improvement in Outcome Scores, But Repair Shows Higher Rates of Knee Stiffness and Failure: A Systematic Review

Mowers, C., Jackson, G. R., Condon, J. J., Dhillon, N., Brusalis, C. M., Khan, Z. A., Batra, A., Jawanda, H., Mameri, E. S., Kaplan, D. J., Knapik, D. M., Verma, N. N. & Chahla, J., Oct 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 10, p. 2231-2240 10 p.

Research output: Contribution to journal › Review article › peer-review

7 Scopus citations

Medial Meniscal Extrusion of Greater Than 3 Millimeters on Ultrasound Suggests Combined Medial Meniscotibial Ligament and Posterior Medial Meniscal Root Tears: A Cadaveric Analysis

Farivar, D., Knapik, D. M., Vadhera, A. S., Condron, N. B., Hevesi, M., Shewman, E. F., Ralls, M., White, G. M. & Chahla, J., Aug 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 8, p. 1815-1826.e1

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Nonoperative Management of Tibial Stress Fractures Result in Higher Return to Sport Rates Despite Increased Failure Versus Operative Management: A Systematic Review

Schundler, S. F., Jackson, G. R., McCormick, J. R., Tuthill, T., Lee, J. S., Batra, A., Jawanda, H., Kaplan, D. J., Chan, J., Knapik, D. M., Verma, N. N. & Chahla, J., Jun 2023, In: Arthroscopy, Sports Medicine, and Rehabilitation. 5, 3, p. e881-e889

Research output: Contribution to journal › Review article › peer-review

Open Access

1 Scopus citations

Outcomes of Distal Femoral Osteotomy for Valgus Malalignment: A Systematic Review and Meta-analysis of Closing Wedge Versus Opening Wedge Techniques

Diaz, C. C., Lavoie-Gagne, O. Z., Knapik, D. M., Korrapati, A., Chahla, J. & Forsythe, B., Mar 2023, In: American Journal of Sports Medicine. 51, 3, p. 798-811 14 p.

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Patient-Specific Variables Associated with Failure to Achieve Clinically Significant Outcomes After Meniscal Allograft Transplantation at Minimum 5 Year Follow-Up

Wagner, K. R., Kaiser, J. T., Knapik, D. M., Condron, N. B., Gilat, R., Meeker, Z. D., Sivasundaram, L., Yanke, A. B. & Cole, B. J., Nov 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 11, p. 2327-2338 12 p.

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Radiofrequency-Based Chondroplasty Creates a Precise Area of Targeted Chondrocyte Death With Minimal Necrosis Outside the Target Zone: A Systematic Review

Jackson, G. R., Salazar, L. M., McCormick, J. R., Gopinatth, V., Hodakowski, A., Mowers, C. C., Dasari, S., Fortier, L. M., Kaplan, D. J., Khan, Z. A., Mameri, E. S., Knapik, D. M., Chahla, J. & Verma, N. N., Aug 2023, In: Arthroscopy, Sports Medicine, and Rehabilitation. 5, 4, 100754.

Research output: Contribution to journal › Review article › peer-review

Open Access

Relationship between Kinesiophobia and Dynamic Postural Stability after Anterior Cruciate Ligament Reconstruction: A Prospective Cohort Study

Knapik, D. M., Kamitani, A., Smith, M. V., Motley, J., Haas, A., Matava, M. J., Wright, R. & Brophy, R. H., 2023, (Accepted/In press) In: Journal of Knee Surgery.

Research output: Contribution to journal › Article › peer-review

Return to Sport After Nonoperative Management of Elbow Ulnar Collateral Ligament Injuries: A Systematic Review and Meta-analysis

Gopinatth, V., Batra, A. K., Khan, Z. A., Jackson, G. R., Jawanda, H. S., Mameri, E. S., McCormick, J. R., Knapik, D. M., Chahla, J. & Verma, N. N., 2023, (Accepted/In press) In: American Journal of Sports Medicine.

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Smaller diameter femoral tunnel biocomposite interference screws provide adequate fixation strength in anterior cruciate ligament reconstruction

Ina, J. G., Megerian, M. F., Knapik, D. M., Calcei, J. G., Rimnac, C. M. & Voos, J. E., Aug 2023, In: Knee Surgery, Sports Traumatology, Arthroscopy. 31, 8, p. 3434-3440 7 p.

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Spinopelvic Parameters Do Not Influence Outcomes Following Primary Hip Arthroscopy for the Treatment of Femoroacetabular Impingement Syndrome

Knapik, D. M., Clapp, I. M., Wichman, D. M. & Nho, S. J., Feb 2023, In: Arthroscopy, Sports Medicine, and Rehabilitation. 5, 1, p. e119-e127

Research output: Contribution to journal › Article › peer-review

Open Access

8 Scopus citations

Suture Augmentation in Orthopaedic Surgery Offers Improved Time-Zero Biomechanics and Promising Short-Term Clinical Outcomes

Jackson, G. R., Opara, O., Tuthill, T., Khan, Z. A., Hevesi, M., Mameri, E., Jawanda, H., Batra, A. K., Schundler, S., McCormick, J., Knapik, D. M., Verma, N. & Chahla, J., May 2023, In: Arthroscopy - Journal of Arthroscopic and Related Surgery. 39, 5, p. 1357-1365 9 p.

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Systematic Review and Meta-analysis of Clinical Outcomes After Management of Posterior Cruciate Ligament Tibial Avulsion Fractures

Gopinatth, V., Mameri, E. S., Casanova, F. J., Khan, Z. A., Jackson, G. R., McCormick, J. R., Brophy, R. H., Knapik, D. M., LaPrade, R. F. & Chahla, J., Sep 2023, In: Orthopaedic Journal of Sports Medicine. 11, 9

Research output: Contribution to journal › Review article › peer-review

Open Access

2 Scopus citations

Trends in Orthopedic Device Innovation: An Analysis of 510(k) Clearances and Premarket Approvals From 2000 to 2019

Blackburn, C. W., Tanenbaum, J. E., Knapik, D. M., Voos, J. E., Gillespie, R. J. & Wetzel, R. J., Mar 2023, In: Orthopedics. 46, 2, p. E98-E104

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

2022

Allografts for anterior cruciate ligament reconstruction

Bedi, A., DeFroda, S. & Knapik, D. M., Jan 1 2022, Surgical Techniques of the Shoulder, Elbow, and Knee in Sports Medicine, Third Edition. Elsevier, p. 724-737 14 p.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

An anatomic and 3D study of the development of the proximal humeral physis

Knapik, D. M., Do, M. T., Fausett, C. L. & Liu, R. W., Jun 2022, In: Surgical and Radiologic Anatomy. 44, 6, p. 869-876 8 p.

Research output: Contribution to journal › Article › peer-review

Arthroscopic management of massive rotator cuff tears: Superior capsule reconstruction

Gilat, R., Parvaresh, K. C., Knapik, D. M., Adams, C. R. & Cole, B. J., Jan 1 2022, Surgical Techniques of the Shoulder, Elbow, and Knee in Sports Medicine, Third Edition. Elsevier, p. 230-236 7 p.

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Arthroscopic Reduction and Internal Fixation of an Osseous Bankart Lesion

Vadhera, A. S., Knapik, D. M., Gursoy, S., Dasari, S. P., Singh, H. & Verma, N. N., Jun 27 2022, In: JBJS Essential Surgical Techniques. 12, 2, p. E2100060

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Arthroscopic Rotator Cuff Repair with Biphasic Interpositional Allograft Augmentation

Dandu, N., Knapik, D. M., Zavras, A. G., Garrigues, G. E. & Yanke, A. B., Apr 2022, In: Arthroscopy Techniques. 11, 4, p. e483-e489

Research output: Contribution to journal › Article › peer-review

Open Access

3 Scopus citations

Derrick Knapik

Research output

Search results