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Figures
- Figure
Absolute standardized difference for each variable before and after propensity-score matching. Abbreviations: ASA, American Society of Anesthesiologists; BMI, body mass index; BP, back pain; MCS, mental component score; ODI, Oswestry Disability Index; PCS, physical component score; LP, leg pain; Std, standard; VAS, visual analog scale.
Tables
Characteristics Nondiabetics (n = 30) Diabetics (n = 30) P a Age, y 61.7 ± 10.9 63.3 ± 8.6 0.533 Sex Women 17 (56.7%) 15 (50.0%) 0.605 Men 13 (43.3%) 15 (50.0%) Body mass index 28.0 ± 4.7 28.2 ± 4.3 0.863 ASA classification 2.3 ± 0.5 2.3 ± 0.5 0.786 Smoking 9 (30.0%) 5 (16.7%) 0.222 Comorbidities Hypertension 19 (63.3%) 22 (73.3%) 0.405 Hypercholesterolemia 15 (50.0%) 23 (76.7%) 0.032 Ischemic heart disease 3 (10.0%) 7 (23.3%) 0.166 Stroke 1 (3.3%) 0 (0.0%) 0.313 Asthma 1 (3.3%) 3 (10.0%) 0.301 Operative time, min 155.2 ± 44.3 155.3 ± 31.9 0.998 Length of stay, d 4.1 ± 1.9 4.5 ± 3.0 0.658 Preoperative outcomes VAS back pain 6.8 ± 2.8 6.5 ± 2.6 0.740 VAS leg pain 7.1 ± 3.0 6.7 ± 3.0 0.552 Oswestry Disability Index 52.9 ± 17.7 52.6 ± 17.9 0.945 SF-36 PCS 28.6 ± 8.2 29.7 ± 9.7 0.658 SF-36 MCS 47.6 ± 11.0 44.8 ± 12.0 0.341 Abbreviations: ASA, American Society of Anesthesiologists; MCS, mental component score; PCS, physical component score; SF-36, Short Form-36; VAS, visual analog scale.
Note: Data presented as n (%) or mean ± SD. Boldface values indicate statistical significance (P < 0.05).
↵a P value was calculated for each category using χ2 analysis (categorical) or student’s t test (continuous).
Comparison at 1 Mo Nondiabetics
(n = 30)Diabetics (n = 30) P a VAS back pain 1.1 ± 2.3 0.4 ± 1.2 0.142 VAS leg pain 1.2 ± 2.2 0.7 ± 2.0 0.301 ODI 30.4 ± 15.4 31.1 ± 16.6 0.871 SF-36 PCS 28.9 ± 9.7 32.5 ± 12.2 0.211 SF-36 MCS 50.9 ± 11.7 48.6 ± 12.8 0.479 MCID attainment SF-36 PCS (4.9) 14 (46.7%) 13 (43.3%) 0.795 ODI (12.8) 19 (63.3%) 18 (60.0%) 0.791 VAS back pain (1.2) 24 (80.0%) 26 (86.7%) 0.488 VAS leg pain (1.6) 24 (80.0%) 25 (83.3%) 0.739 Comparison at 3 Mo Nondiabetics
(n = 30)Diabetics (n = 30) P a VAS back pain 0.8 ± 2.4 1.0 ± 2.0 0.686 VAS leg pain 0.5 ± 1.9 1.0 ± 2.4 0.412 ODI 21.0 ± 18.2 23.8 ± 17.0 0.553 SF-36 PCS 44.3 ± 9.7 40.4 ± 11.5 0.168 SF-36 MCS 55.1 ± 8.3 53.9 ± 12.1 0.670 MCID Attainment SF-36 PCS (4.9) 27 (90.0%) 16 (53.3%) 0.002 ODI (12.8) 27 (90.0%) 20 (66.7%) 0.028 VAS back pain (1.2) 25 (83.3%) 24 (80.0%) 0.739 VAS leg pain (1.6) 24 (80.0%) 25 (83.3%) 0.739 Comparison at 6 Mo Nondiabetics
(n = 30)Diabetics (n = 30) P a VAS back pain 0.7 ± 1.8 1.1 ± 2.3 0.539 VAS leg pain 0.5 ± 1.4 1.1 ± 2.5 0.282 ODI 13.6 ± 14.5 19.0 ± 15.5 0.169 SF-36 PCS 45.9 ± 9.9 43.3 ± 11.1 0.348 SF-36 MCS 54.9 ± 9.1 52.0 ± 10.2 0.248 MCID attainment SF-36 PCS (4.9) 26 (86.7%) 20 (66.7%) 0.067 ODI (12.8) 29 (96.7%) 24 (80.0%) 0.044 VAS back pain (1.2) 25 (83.3%) 22 (73.3%) 0.347 VAS leg pain (1.6) 26 (86.7%) 23 (76.7%) 0.317 Comparison at 2 Y Nondiabetics
(n = 30)Diabetics (n = 30) P a VAS back pain 1.1 ± 2.5 0.8 ± 1.9 0.650 VAS leg pain 0.4 ± 1.7 0.8 ± 2.2 0.469 ODI 12.2 ± 17.9 15.1 ± 15.3 0.512 SF-36 PCS 45.7 ± 10.5 44.7 ± 10.9 0.704 SF-36 MCS 55.8 ± 10.7 50.5 ± 12.4 0.079 MCID attainment SF-36 PCS (4.9) 25 (83.3%) 22 (73.3%) 0.347 ODI (12.8) 29 (96.7%) 25 (83.3%) 0.085 VAS back pain (1.2) 25 (83.3%) 27 (90.0%) 0.448 VAS leg pain (1.6) 25 (83.3%) 25 (83.3%) 1.000 Abbreviations: MCID, minimal clinically important difference; MCS, mental component score; ODI, Oswestry Disability Index; PCS, physical component score; VAS, visual analog scale.
Note: Data presented as n (%) or mean ± SD. Boldface values indicate statistical significance (P < 0.05).
↵a P value was calculated for each category using χ2 analysis (categorical) or student’s t test (continuous).
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