harris hip score calculator

What is the Harris Hip Score?

The Harris Hip Score (HHS) is a widely used orthopedic outcome measure for evaluating hip function, especially before and after hip surgery such as total hip arthroplasty. It combines pain, daily function, deformity findings, and range of motion into a single score out of 100.

Because it captures both symptoms and practical mobility, the score is commonly used in clinical follow-up, research studies, and quality improvement projects in joint replacement care.

How the Score is Structured

1) Pain (Maximum 44 points)

Pain carries the highest weight in the HHS. Severe pain quickly lowers the total score even when mobility appears decent, which reflects how strongly pain affects quality of life.

2) Function (Maximum 47 points)

Function includes several practical activities:

• Limp
• Need for support (cane/crutch)
• Walking distance
• Stair climbing
• Putting on shoes and socks
• Sitting tolerance
• Use of public transportation

3) Absence of Deformity (Maximum 4 points)

This section checks whether key deformity thresholds are absent. In classic scoring, this is often an all-or-none component.

4) Range of Motion (Maximum 5 points)

Range of motion contributes a smaller but meaningful portion of the total score. In detailed exams, this is calculated from measured movement arcs.

Interpreting Harris Hip Score Results

A commonly used interpretation framework is:

• 90-100: Excellent
• 80-89: Good
• 70-79: Fair
• Below 70: Poor

These categories are useful for trend tracking over time. A patient's change in score from baseline may be more informative than one isolated score.

When to Use This Calculator

• Pre-op and post-op hip replacement evaluation
• Routine orthopedic follow-up visits
• Physical therapy progress documentation
• Clinical audits and outcomes reporting

This calculator is ideal when you want a quick, standardized summary of hip status using familiar scoring logic.

Practical Tips for Better Accuracy

• Use a consistent interview style at each visit.
• Document assistive device usage clearly (none, cane, crutch, etc.).
• Measure range of motion with the same technique each time.
• Record context for pain (rest vs activity) to improve interpretation.
• Compare with additional patient-reported tools when needed (for example HOOS or Oxford Hip Score).

Limitations to Keep in Mind

Like any clinical scale, the HHS has limits. It may not fully capture psychosocial factors, high-level athletic demands, or nuanced patient-reported quality-of-life changes. It is best used as one part of a full clinical assessment rather than a standalone decision tool.

Bottom Line

The Harris Hip Score remains a practical and trusted method for hip outcome assessment. If used consistently, it can provide clear, comparable data to support treatment decisions and monitor long-term progress after hip interventions.