Reproducibility and minimal detectable change of sustained maximal inspiratory pressure in healthy adults.
Takuya Ujikawa, Hiroki Sato, Sho Takahashi and 2 others
PMID 41036519WHAT IT FOUND
A sustained maximal inspiratory pressure test gave consistent scores when repeated one minute apart in 30 healthy young adults.
Changes above 88.4 pressure-time units or 16.9% can be considered real rather than measurement noise.
Key findings
01Repeated SMIP measurements showed ICC values of 0.937 and 0.969.
02Bland-Altman analysis found no fixed or proportional bias for either SMIP condition.
03The minimal detectable change was 124.7 PTU (23.8%) for the MIP-guided condition and 88.4 PTU (16.9%) for the SMIP-guided condition.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample was 30 healthy Japanese young adults aged 21 to 30 years, so it does not show how the test behaves in older adults or people with disease. The SMIP-guided reliability analysis included 28 participants, while the table reports 30 participants for the MIP-guided condition. The authors state that the minimal detectable change is population-specific and that many factors that may influence SMIP are unknown.
Declared interests
This study was supported by JSPS KAKENHI grant number 21K17540. The authors declared no relevant financial or non-financial interests.
The easy way to misread this
Do not apply the 88.4 PTU or 16.9% change threshold to patients or older adults as if it were validated. It was derived in 30 healthy young adults, and the authors state that generalisation to older adults or patients is unclear.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →