Table 1.

Participant Characteristics

	All Enrolled Participants (n=25) Mean (SD)	Range (min-max) n=25	Participants Included in Analysis (n=23) Mean (SD)	Range (min-max) n=23
Age (years)	21.7 (3.5)	18 – 36	21.8 (3.7)	18 – 36
BMI (kg/m2)	22.3 (2.1)	17.5 – 26.6	22.2 (2.0)	17.5 – 26.6
Pain Duration (years)	4.3 (3.5)	0.5 – 11	4.1 (3.4)	0.5 – 10
Pain Level: average past week (NPRS)	3.7 (1.0)	2–6	3.7 (1.0)	2–6
Pain Level: maximum past week (NPRS)	6.2 (1.0)	3–8	6.2 (1.1)	3–8
Habitual Physical Activity: work index*	2.3 (0.5)	1.3 – 3.4	2.3 (0.5)	1.3 – 3.4
Habitual Physical Activity: sport index*	2.8 (0.7)	1.3 – 4.3	2.8 (0.6)	1.5 – 4.3
Habitual Physical Activity: leisure index*	2.9 (0.5)	2.0 – 4.0	2.9 (0.5)	2.0 – 3.5
Involved (tested) Side (n)	Left (11) Right (14)		Left (11) Right (12)
Bilateral Pain (n)	Bilateral (22) Unilateral (3)		Bilateral (20) Unilateral (3)
Frequency of Activities Limited by Pain# (n)	Running (19) Stairs (16) Squatting (12) Prolonged Sitting (10)		Running (18) Stairs (14) Squatting (12) Prolonged Sitting (9)
Previous Physical Therapy Treatment for Patellofemoral Pain (n)	10		10

n = number of participants; SD = Standard Deviation; NPRS = numeric pain rating scale (0 = no pain, 10 = worst imaginable pain)

^*Habitual Physical Activity[19] (Range for each index: 1–5, where 1 = inactive and 5 = highly active)

^#Most frequently reported activities limited by pain, as noted on the Patient-specific Functional Scale[29]