Table 2.
Patient demographics.
| Parameter | PJK (+) | PJK (−) | p | |||
|---|---|---|---|---|---|---|
| n | 7 | 20 | ||||
| Sex (male, female) | 1 | 6 | 4 | 16 | ||
| Age (years) | 67.5 | ±6.24 | 68.6 | ±10.2 | 0.969 | |
| Height (cm) | 146.7 | ±7.8 | 151.1 | ±35.3 | 0.340 | |
| Body weight (kg) | 52.9 | ±12.3 | 49.6 | ±14.1 | 0.668 | |
| BMD (g/cm2) | 0.63 | ±0.1 | 0.60 | ±0.2 | 0.669 | |
| YAM (%) | 77.3 | ±8.6 | 73.6 | ±25.9 | 0.635 | |
| Preop | C7SVA (mm) | 115.9 | ±51.9 | 112.7 | ±58.1 | 0.900 |
| TK ° | 20.5 | ±11.8 | 16.3 | ±15.6 | 0.524 | |
| LL ° | 6.3 | ±16.8 | 11.7 | ±20.3 | 0.703 | |
| PT ° | 36.7 | ±9.4 | 31.6 | ±14.8 | 0.436 | |
| PI ° | 52.3 | ±12.8 | 49.6 | ±15.4 | 0.501 | |
| TPA ° | 39.7 | ±11.4 | 35.5 | ±16.7 | 0.625 | |
| PI–LL ° | 46.0 | ±19.5 | 37.8 | ±23.2 | 0.463 | |
| C7CSVL (mm) | 3.6 | ±31.3 | 4.6 | ±28.9 | 0.742 | |
| Coronal Cobb angle° | 37.4 | ±21.7 | 24.1 | ±15.5 | 0.102 | |
Mean ± standard deviation; n, number of patients; BMD, bone mineral density; YAM, young adult mean; C7SVA, C7 plumb line to sagittal vertical axis distance; TK, thoracic kyphosis; LL, lumbar lordosis; PT, pelvic tilt; PI, pelvic incidence; TPA, T1 pelvic angle; PI–LL, PI minus LL, C7CSVL, C7 plumb line to central sacral vertical line distance; PreOp, preoperative parameter.