Measurement Properties in People with Hemophilia

SPPB comprises three components: Standing balance (open stand, half tandem stand and tandem stand), timed four meter usual paced walk, and timed test of five sit-to-stands from a standard chair. Each component is scored from 0 to 4, with maximum of 12and timed test of five sit-to-stands from a standard chair.

The FSST is a performance-based outcome measure assessing dynamic balance. The test set up consists of four walking sticks of the same width in a cross formation. Participants step into each square in a clockwise sequence and back anticlockwise as fast as possible while not being allowed to hit the sticks.

The TUG is a performance-based outcome measure that assesses lower extremity function, mobility, and fall risk. In this test, the participant starts in a seated position, with his back against a standard height chair, without armrest. The participant gets up and walks in a comfortable pace for 10 feet (three meters), turns around and returns to a seated position in the chair. The time to perform the task is measured in seconds. Shorter time indicates better mobility.

The UST is a balance assessment that is widely used in clinical settings to monitor neurological and musculoskeletal conditions. Abnormal values may indicate conditions that may impair balance and will quantify balance status for those who are at increased risks for fall. The test is performed barefoot, hands crossed over the chest and once with eyes open and once with eyes closed. Patient stands on one leg unassisted; time begins when opposite foot leaves the ground. Time stops immediately when arms are uncrossed, the raised foot is used to maintain balance or touches the ground, weight-baring foot is moved, 45 second have elapsed or when eyes were opened on eyes closed trial. Each condition (eyes open or eyes closed) is performed three times, alternatively.

The 30-Second Chair Stand Test measures the muscle function of the lower extremity by counting how many times a patient rises from a seated position to a full stand at his/her own pace

The 1 kg arm lift test measures the muscle function of the upper extremity. It counts how many time a patient can lift a 1 kilogram weight above their head within 30 seconds at his/her own pace

The Short Form 36 is a generic health related quality of life instrument consisting of 36 items pertaining to eight dimensions ('physical functioning', 'role physical functioning', 'bodily pain', 'general health perception', 'vitality', 'social functioning', 'role emotional functioning' and 'mental health'. The possible score ranges from 0 to 100 points, with 0 points representing the greatest possible health restriction, while 100 points indicate no health restriction.

In addition, each item is scored on a 0 to 100 range so that the lowest and highest possible scores are 0 and 100, respectively.

The Hemophilia Activities List measures the impact of hemophilia on self-perceived functional abilities in adults. It contains 42 multiple choice questions in seven domains: Lying/sitting/kneeling/standing (8 items), Functions of the legs (9 items), Functions of the arms (4 items), Use of transportation (3 items), Self-care (5 items), Household tasks (6 items), Leisure activities and sports (7 items). The final version of the HAL has good internal consistency and convergent validity and gives the clinician insight into a patient's self-perceived ability to perform activities of daily life. The possible scores range from 0 to 100, where 0 represents the worst possible functional status and 100 the best possible functional status.

The Hemophilia Joint Health Score2.1 includes swelling, duration (of swelling), muscle atrophy, crepitus on motion, flexion loss, extension loss, joint pain, strength, and global gait.

For each of the Elbow, Knee and Ankle joints (left / rigth), the following items are scored: swelling (scored 0-3), duration of swelling (0-1), muscle atrophy (0-2), crepitus on motion (0-2), flexion loss (0-3), extension loss (0-3), joint pain (0-2), and strength (0-4). The maximum score for an individual index joint is 20. Gait is scored 0 to 4. The maximum HJHS total score is 124, with a higher score indicating worse joint health.