Short answer

When designing rehabilitation programs or patient education materials for ACL reconstruction, consider the influence of patient demographics, lifestyle factors (smoking), graft choice, and the presence of associated knee injuries on the patient's perceived success of the procedure.

Field: Human Factors
Source: British Journal of Sports Medicine (2018)
Method: Systematic Review
Evidence: Strong effect

Patient-reported outcomes after anterior cruciate ligament reconstruction are significantly influenced by biological and injury-related factors, with younger age, male sex, non-smoking status, hamstring autografts, and the absence of cartilage or meniscal injuries correlating with superior results. This human factors research insight is drawn from a 2018 study published in British Journal of Sports Medicine. Using Systematic review, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing rehabilitation programs or patient education materials for ACL reconstruction, consider the influence of patient demographics, lifestyle factors (smoking), graft choice, and the presence of associated knee injuries on the patient's perceived success of the procedure.

Study

Human FactorsHigh ImpactStrong effect

Hamstring autografts and absence of concomitant injuries improve ACL reconstruction outcomes

British Journal of Sports Medicine · 2018

Key Findings

01Younger age at reconstruction, male sex, non-smoking status, and hamstring tendon autografts were associated with better patient-reported outcomes.
02Concomitant cartilage and meniscal injuries led to inferior subjective knee function compared to isolated ACL tears.
03Non-reconstructive treatment was associated with inferior knee function compared to ACL reconstruction.

Application

Design takeaway

How to apply

When developing treatment protocols or patient support tools for ACL reconstruction, integrate considerations for age, smoking cessation advice, graft selection discussions, and thorough assessment and management of associated knee injuries.

Project actions

01When researching a medical device or treatment, consider how patient characteristics and pre-existing conditions might affect the success of the intervention.
02If your design aims to improve patient outcomes, think about how to account for or mitigate the impact of factors outside of the device itself, such as lifestyle or co-occurring injuries.

Method & Evidence

AimTo systematically review factors influencing patient-reported outcomes following anterior cruciate ligament reconstruction, as documented in Scandinavian knee ligament registers.

MethodSystematic Review

ProcedureA systematic review was conducted by searching four electronic databases (PubMed, EMBASE, Cochrane Library, AMED) for studies published from 2004 onwards that utilized Scandinavian knee ligament register data, reported patient-reported outcomes, and included information on concomitant injuries. Studies were screened for eligibility, and their quality was appraised using a modified Downs and Black checklist.

ContextOrthopedic surgery, sports medicine, rehabilitation

Variables

IV["Age at reconstruction","Sex","Smoking status","Type of autograft (hamstring vs. other)","Presence of concomitant cartilage injuries","Presence of concomitant meniscal injuries"]

DVPatient-reported outcome (subjective knee function, satisfaction)

CV["Surgical technique (though the review focuses on outcomes post-reconstruction)","Rehabilitation protocols (can vary, but the study focuses on factors influencing outcomes)","Specific register data collection methods"]

Strengths & Limitations

Strengths

+Systematic review methodology ensures comprehensive data synthesis.
+Focus on large, real-world data from Scandinavian knee ligament registers provides robust evidence.
+Inclusion of patient-reported outcomes directly reflects patient experience.

Limitations

The findings are specific to patients who underwent ACL reconstruction and were part of Scandinavian registers. The subjective nature of 'patient-reported outcome' can introduce bias.

Reliability & validity

The reliability of the findings is enhanced by the systematic review process, which aims to minimize bias in study selection and data extraction. Validity is supported by the use of large, established national registers and a quality appraisal checklist for included studies.

Think critically

How might a designer proactively address the negative impact of concomitant injuries on patient-reported outcomes in the design of post-operative rehabilitation tools or assistive devices?

Design Principles

"Patient-reported outcomes are multifactorial and influenced by biological, lifestyle, and injury-specific characteristics."

This research highlights critical patient-specific and injury-related variables that directly impact the success of ACL reconstruction from the patient's perspective. Understanding these factors allows for more personalized treatment planning and setting realistic expectations for recovery and functional outcomes.

What This Means for Your Design

This study looked at what makes people happier with their knee surgery after an ACL injury. It found that younger people, men, non-smokers, and those who had hamstring tendons used for the graft tended to report better results. Also, if patients had other knee problems like torn cartilage or meniscus along with their ACL tear, they weren't as happy with their knee function afterwards.

How to use in your project

1.Use this research to justify the importance of considering patient-specific factors in your design brief or problem statement, especially if your design relates to medical devices, rehabilitation, or patient care.
2.Cite this study when discussing the limitations of a purely technical design approach and the need to incorporate human factors and patient context.

Add to My Project

Quick Cite

Paragraph starter

This systematic review highlights that patient-reported outcomes following anterior cruciate ligament reconstruction are significantly influenced by a confluence of factors beyond the surgical procedure itself. Specifically, younger age at the time of surgery, male sex, non-smoking status, and the use of hamstring tendon autografts were identified as positive predictors of superior outcomes. Conversely, the presence of concomitant injuries, such as cartilage or meniscal damage, was associated with diminished subjective knee function. These findings underscore the importance of a holistic approach in designing and implementing treatment strategies, acknowledging that biological predispositions, lifestyle choices, and the extent of initial injury play a critical role in the patient's perceived success and functional recovery.

Source

British Journal of Sports Medicine

Factors that affect patient reported outcome after anterior cruciate ligament reconstruction–a systematic review of the Scandinavian knee ligament registers

journal · 2018

View source

Questions About This Research

What does the research say about hamstring autografts and absence of concomitant injuries improve acl reconstruction outcomes?: When designing rehabilitation programs or patient education materials for ACL reconstruction, consider the influence of patient demographics, lifestyle factors (smoking), graft choice, and the presence of associated knee injuries on the patient's perceived success of the procedure. Evidence: British Journal of Sports Medicine (2018).
Why does "Hamstring autografts and absence of concomitant injuries improve ACL reconstruction outcomes" matter for design?: This research highlights critical patient-specific and injury-related variables that directly impact the success of ACL reconstruction from the patient's perspective. Understanding these factors allows for more personalized treatment planning and setting realistic expectations for recovery and functional outcomes.
How can designers apply this research?: When designing rehabilitation programs or patient education materials for ACL reconstruction, consider the influence of patient demographics, lifestyle factors (smoking), graft choice, and the presence of associated knee injuries on the patient's perceived success of the procedure.
What were the main findings?: Younger age at reconstruction, male sex, non-smoking status, and hamstring tendon autografts were associated with better patient-reported outcomes.. Concomitant cartilage and meniscal injuries led to inferior subjective knee function compared to isolated ACL tears.. Non-reconstructive treatment was associated with inferior knee function compared to ACL reconstruction.
What research method was used?: Systematic Review.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2018 journal from British Journal of Sports Medicine.
What should I do differently in my next project?: When developing treatment protocols or patient support tools for ACL reconstruction, integrate considerations for age, smoking cessation advice, graft selection discussions, and thorough assessment and management of associated knee injuries.
What are the limitations?: The review is based on data from Scandinavian registers, which may not be generalizable to all populations. The definition and measurement of 'patient-reported outcome' can vary across studies.