This study describes how the QuickDASH was created by applying three different item-reduction methods to the 30-item DASH questionnaire. It compares the psychometric properties of the resulting 11-item versions to determine which should become the official shortened upper-limb outcome instrument. The concept-retention version was selected and named the QuickDASH.
The QuickDASH is one of the most widely used patient-reported outcome measures in upper-extremity orthopedics, and this paper is its founding validation study. When you use the QuickDASH in clinic or in a research protocol, three rules govern scoring: use the formula (sum/n − 1) × 25, accept a maximum of one missing item, and understand that a score of 100 represents maximum disability.
For research design, the concept-retention QuickDASH has a relative efficiency of 0.96 versus the full DASH. The statistically derived alternatives require roughly 25–40% larger samples to detect the same effect size, making them less practical.
A Cronbach alpha below 0.90 makes any questionnaire unsuitable for monitoring individual patients — the confidence interval around the score becomes too wide to be clinically useful. The QuickDASH was specifically engineered to stay above this threshold with the minimum possible item count.
This study describes how the QuickDASH was created by applying three different item-reduction methods to the 30-item DASH questionnaire. It compares the psychometric properties of the resulting 11-item versions to determine which should become the official shortened upper-limb outcome instrument. The concept-retention version was selected and named the QuickDASH.
The QuickDASH is one of the most widely used patient-reported outcome measures in upper-extremity orthopedics, and this paper is its founding validation study. When you use the QuickDASH in clinic or in a research protocol, three rules govern scoring: use the formula (sum/n − 1) × 25, accept a maximum of one missing item, and understand that a score of 100 represents maximum disability.
For research design, the concept-retention QuickDASH has a relative efficiency of 0.96 versus the full DASH. The statistically derived alternatives require roughly 25–40% larger samples to detect the same effect size, making them less practical.
A Cronbach alpha below 0.90 makes any questionnaire unsuitable for monitoring individual patients — the confidence interval around the score becomes too wide to be clinically useful. The QuickDASH was specifically engineered to stay above this threshold with the minimum possible item count.