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Table 4 Data on age, MLC, gender and PRO instruments (mean score, internal consistency and correlation with MLC)

From: Body image in idiopathic scoliosis: a comparison study of psychometric properties between four patient-reported outcome instruments

  < 18 years old ≥ 18 years old Overall sample
n 42 38 80
Mean age (years) (SD) 13.9 (1.9) 27.3 (7.4) 20.3 (8.6)
MLC (SD) 42.8° (13.0) 49° * (11.7) 21.2° (13)
Gender (% female) 85.7% 84.2% 85%
TAPS
Mean score (max score = 5) (SD) 3.6 (0.8) 2.8* (0.8) 3.2 (.9)
Internal consistency (Cronbach’s α) .83 .85 .87
Relation with Cobb angle (Pearson’s r) -.64 -.55 -.62
Appearance SAQ
Mean score (max score = 50) (SD) 21.3 (6.6) 27.6* (6.8) 15.3 (7.3)
Internal consistency (Cronbach’s α) .86 .87 .89
Relation with Cobb angle (Pearson’s r) .6 .55 .61
Expectation SAQ
Mean score (max score = 20) (SD) 15.3 (4.8) 15.4 (5.0) 24.3 (5.0)
Internal consistency (Cronbach’s α) .84 .9 .87
Relation with Cobb angle (Pearson’s r) .26** .23** .24
QLPSD-bi
Mean score (max score = 20) (SD) 10.8 (4.0) 12.11* (4.9) 11.4 (4.4)
Internal consistency (Cronbach’s α) .8 .86 .8
Relation with Cobb angle (Pearson’s r) .2** .47 .36
SRS-22 Self Image
Mean score (max score = 5) (SD) 3.4 (3.1) 2.98* (3.8) 3.4 (3.6)
Internal consistency (Cronbach’s α) .73 .81 .78
Relation with Cobb angle (Pearson’s r) -.2 ** -.55 -.41
  1. *Indicates significant between-groups mean differences in t-Student test.
  2. **Indicates no significant correlation coefficient.