Table 5.
Radiographic measures of cohort
| PT cutoff: 20° (n=188) |
PI-LL cutoff: 11° (n=188) |
||||||
|---|---|---|---|---|---|---|---|
| Overall (n=188) | PT <20° (n=64) | PT ≥20° (n=124) | P a | PI-LL <11° (n=126) | PI-LL ≥11° (n=62) | P a | |
| L4-S1 lordosis | |||||||
| Pre | 28.5 (10.5) | 32.1 (8.66) | 26.7 (10.9) | <0.001* | 31.8 (9.09) | 22.0 (10.1) | <0.001* |
| Post | 28.1 (18.1) | 33.6 (26.2) | 25.3 (11.0) | 0.018* | 31.6 (20.2) | 21.1 (9.53) | <0.001* |
| Delta | −0.37 (16.6) | 1.59 (26.1) | −1.38 (8.07) | 0.377 | −0.12 (19.2) | −0.89 (9.39) | 0.712 |
| LL° | |||||||
| Pre | 51.2 (13.3) | 53.0 (11.4) | 50.2 (14.2) | 0.152 | 55.8 (10.8) | 41.8 (13.2) | <0.001* |
| Post | 52.3 (13.4) | 53.0 (12.8) | 52.0 (13.7) | 0.620 | 56.1 (11.3) | 44.7 (14.0) | <0.001* |
| Delta | 1.25 (8.82) | 0.27 (7.84) | 1.75 (9.28) | 0.250 | 0.45 (7.05) | 2.87 (11.5) | 0.132 |
| PI-LL° | |||||||
| Pre | 7.02 (13.2) | −2.23 (8.93) | 11.8 (12.6) | <0.001* | −0.13 (8.20) | 21.6 (8.84) | <0.001* |
| Post | 5.85 (12.0) | −1.02 (9.72) | 9.39 (11.6) | <0.001* | 0.15 (8.59) | 17.4 (9.45) | <0.001* |
| Delta | −1.18 (8.76) | 1.21 (7.24) | −2.41 (9.23) | 0.004* | 0.28 (7.26) | −4.14 (10.7) | 0.004* |
| PT° | |||||||
| Pre | 22.9 (8.90) | 13.9 (4.69) | 27.5 (6.76) | <0.001* | 19.5 (7.71) | 29.8 (7.03) | <0.001* |
| Post | 23.1 (8.05) | 17.3 (6.31) | 26.1 (7.17) | <0.001* | 20.0 (6.42) | 29.4 (7.36) | <0.001* |
| Delta | 0.17 (6.73) | 3.34 (4.92) | −1.46 (6.97) | <0.001* | 0.48 (6.22) | −0.44 (7.69) | 0.415 |
| SS° | |||||||
| Pre | 35.0 (10.1) | 36.7 (8.66) | 34.2 (10.7) | 0.092 | 36.2 (9.14) | 32.8 (11.6) | 0.047* |
| Post | 35.1 (9.93) | 34.8 (8.83) | 35.3 (10.5) | 0.745 | 36.2 (9.37) | 32.9 (10.7) | 0.044* |
| Delta | 0.07 (7.48) | −1.86 (6.02) | 1.06 (7.97) | 0.005* | 0.03 (7.61) | 0.15 (7.26) | 0.920 |
| LASD° | |||||||
| Pre | 26.7 (19.5) | 19.7 (16.2) | 30.3 (20.2) | <0.001* | 21.6 (15.7) | 37.1 (22.3) | <0.001* |
| Post | 28.7 (19.8) | 21.4 (13.1) | 32.5 (21.6) | <0.001* | 24.6 (16.5) | 37.0 (23.4) | <0.001* |
| Delta | 1.99 (15.1) | 1.65 (14.2) | 2.17 (15.6) | 0.818 | 3.01 (14.4) | −0.09 (16.3) | 0.205 |
*Statistical significance (P<0.05), aIndependent samples t-test or Mann-Whitney U-test, Radiographic parameters reported as: Mean (SD). Radiographic parameters: LL - Lumbar lordosis, PI-LL - Pelvic incidence-LL, PT - Pelvic tilt, SS - Sacral slope, L4-S1 lordosis - Anterior disc height, posterior disk height, LASD - L1 axis-S1 distance, SD - Standard deviation