Anales de la RANM

191 A N A L E S R A N M R E V I S T A F U N D A D A E N 1 8 7 9 THORACOLUMBAR ROTATIONAL KYPHOSIS Pizones J, et al. An RANM. 2022;139(02): 186 - 195 t hos e wit h hi gh PI had g reate r postope rat ive MaxLL (56 . 3 ± 12 . 4° vs 47 . 1 ± 11 . 7° ) as wel l as a f l atte r TLK (9 . 9 ± 10 . 5° vs 17 . 2 ± 15 . 7° ) , P  = 0 . 002 ; whi ch match t he expec ted parame - te rs as pe r i dea l s ag itt a l shape. Howeve r, pat i ent s wit h hi gh PI a lso had a hi ghe r rate of postope rat ive s ag itt a l t ype mismatch (76 . 2% vs 28 . 4%; P  < 0 . 001) for postope rat ive SS not mee t ing t he i dea l va lue s . De spite t his f ac t , we we re unabl e to f ind d i f fe rence s be tween t he hi gh and l ow PI g roups regard ing mechani ca l compl i cat i ons (37 . 5% and 39 . 7%, re spec t ively) or TLK cor rec t i on (23. 1° and 19 . 7° change, re spec t ively). Table 4.- Complications and sagittal mismatch comparing the different Roussouly types Anova (Bonferroni), Chi-square Ideal R-type 1&2 Ideal R-type 3 Ideal R-type 4 P Number of Patients 52 78 41 Complication rate 40% 37.2% 39% 0.947 Age (years) 53.18 ± 16.4 59.49 ± 14.3 60.6 ± 13.1 0.026*; B = 0.052 Preop TL Cobb (°) 52.6 ± 15.6 52.8 ± 16.1 56.6 ± 19.2 0.434 TL Cobb change (°) 23.1 ± 15.9 26.7 ± 18.1 23.4 ± 16.7 0.485 Preop TLK 36.3 ± 14.3 34.3 ± 13.4 34.5 ± 13.1 0.383 TLK change (°) 17.8 ± 19.8 22.6 ± 17.8 24.8 ± 15.3 0.194 Postop TLK (°) 18.6 ± 16.8 11.9 ± 11.1 8.2 ± 10.3 0.002*; B = 0.002* Post MaxLL (°) 46.5 ± 11.1 51.4 ± 12 60.4 ± 12.6 0.003*; B = 0.035* Matched Rate of match 93.8% 21.2% 24.3% 0.000* TLK change (°) 18 ± 16.2 18.6 ± 14.7 29.5 ± 17.3 0.274 Complication rate 40% 21.4% 33.3% 0.443 Mismatched Rate of mismatch 6.2% 78.8% 75.7% 0.000* TLK change (°) 16.8 ± 11.2 23.5 ± 14.2 23.2 ± 15.6 0.198 Complication rate 0% 41.7% 75% 0.207 Postop type 100% type 3 72.7% type 1 and 2 6.1% type 3 18.9% type 1 and 2 56% type 3 TL Cobb: thoracolumbar coronal Cobb angle; TLK: thoracolumbar kyphosis; Max LL: maximal lumbar lordosis. * statistical significance