Table 2.

Baseline Characteristics of Study Participants Across 4 Research Centers and Between 2 Treatment Groups

Characteristic	Mean ± SD
	HIP				KNEE
	Research Center
	Calgary, AB	Chicago, IL	Milwaukee, WI	Augusta, GA	Calgary, AB	Chicago, IL	Milwaukee, WI	Augusta, GA
Sex, men/women	10/19	6/23	10/17	8/18	8/15	5/16	12/11	7/14
Age, y	31.28 ± 8.74	28.62 ± 4.88	30.11 ± 8.13	27.50 ± 5.44	30.83 ± 8.46	27.10 ± 6.53	31.39 ± 7.94	25.86 ± 442
Height, cm	169.56 ± 8.59	168.47 ± 8.30	173.26 ± 9.90	170.14 ± 10.63	170.32 ± 9.67	169.52 ± 8.74	172.74 ± 8.41	174.78 ± 10.19
Weight, kg	65.18 ± 9.95	64.01 ± 11.63	72.24 ± 17.52	69.54 ± 12.88	67.67 ± 10.49	67.50 ± 10.49	76.58 ± 16.07	76.48 ± 16.40
Activity, h/wk	3.89 ± 2.64	2.64 ± 1.55	5.07 ± 4.67	2.88 ± 1.37	4.80 ± 3.93	3.66 ± 2.32	4.87 ± 2.90	3.45 ± 2.58
Patellofemoral pain duration, mo	4.71 ± 27.18	29.02 ± 35.91	47.65 ± 61.02	20.04 ± 22.21	12.17 ± 15.42	30.19 ± 38.88	48.63 ± 49.64	31.48 ± 35.44
Anterior Knee Pain Scale score, of 100 points	74.48 ± 8.76	75.52 ± 8.29	75.04 ± 7.21	74.58 ± 13.06	76.09 ± 10.76	75.10 ± 10.34	76.13 ± 7.23	72.24 ± 9.60
Visual analog scale (10 cm) score	5.15 ± 1.98	5.10 ± 1.39	5.37 ± 1.48	4.64 ± 1.74	4.48 ± 1.97	5.58 ± 1.52	5.40 ± 1.35	4.37 ± 1.44

Abbreviations: HIP, hip- and core-strengthening protocol; KNEE, knee-focused protocol.