The comparison of clinical features and quality of life after total knee replacement.
Jiyeon Lee, Jung-Hee Kim, Eun-Jung Jung and 1 others
PMID 28626303WHAT IT FOUND
Pain scores fell from 7.00 to 2.59 on a 0-10 scale after total knee replacement, and knee function and quality-of-life scores were higher at six and twelve months.
Only 33 of 63 patients had twelve-month data.
Key findings
01Pain scores decreased after total knee replacement, from 7.00 before surgery to 2.98 at six months and 2.59 at twelve months.
02Knee Society Knee Score was 38.66 before surgery and 82.61 at twelve months, and Hospital Severity Score was 65.22 before surgery and 85.53 at twelve months.
03SF-36 quality-of-life score was 43.29 before surgery and 60.73 at twelve months on a 0 to 100 scale.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
All patients were from a single hospital, so results may not apply to other settings. The sample became much smaller over time: 63 patients were assessed before surgery, 55 at six months, and 33 at twelve months. There was no control group or randomisation, so the study cannot separate the effect of surgery from other factors. No direct muscle strength assessment was included, even though the paper says muscle strength is important. The paper aimed to compare range of motion, but the supplied results do not report separate range-of-motion values. The supplied text does not report funding or conflicts of interest.
Declared interests
The supplied text does not report funding or conflicts of interest.
The easy way to misread this
Do not read the twelve-month scores as representing all patients. Only 33 of the original 63 patients had outcome data at twelve months, and the study had no control group.