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Table 1 Baseline characteristics of participants. Values are mean (SD) unless otherwise indicated

From: HAPPi Kneecaps! A double-blind, randomised, parallel group superiority trial investigating the effects of sHoe inserts for adolescents with patellofemoral PaIn: phase II feasibility study

Characteristics

Contoured foot orthoses (n = 17)

Flat shoe insoles (n = 19)

Total (N = 36)

Age (years), median [IQR]

14 [5]

17 [3]

15 [4]

Number (%) of females

12 (71)

15 (79)

27 (75)

Height (cm)

165 (9)

169 (12)

167 (10)

Body mass (kg)

58.5 (12.1)

60.8 (14.4)

59.7 (13.3)

Number (%) with bilateral knee pain

11 (65)

10 (53)

21 (58)

Duration of knee pain months, median [IQR]

9 [38]

24 [18]

18.5 [29.5]

Average pain severity^, median [IQR]

50 [24]

50 [40]

50 [34]

Worst pain severity^, median [IQR]

70 [32]

70 [37]

70 [21]

Most painful activity in the last week, count (%):

 squatting

5 (29)

6 (32)

11 (30.5)

 running

6 (35)

5 (26)

11 (30.5)

 walking upstairs

4 (24)

4 (21)

8 (22)

 walking downstairs

2 (12)

1 (5)

3 (8)

 walking

0 (0)

2 (11)

2 (6)

 jumping

0 (0)

1 (5)

1 (3)

  1. ^Measured on a 100 mm visual analogue scale (0 = no pain, 100 mm = worst pain imaginable), during their nominated most aggravating activity in the past week
  2. IQR interquartile range