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Table 2 Comorbidities of study population and those according to hospital types

From: Reoperations after fusion surgeries for degenerative spinal diseases depending on cervical and lumbar regions: a national database study

  All patients (n = 42,060) Tertiary-referral hospital (n = 11,179) General hospital (n = 12,507) Hospital (n = 17,956) Clinic (n = 418) P
Diabetes 16,609 (39.49%) 4,200 (37.58%) 4,702 (37.59%) 7,527 (41.92%) 180 (43.06%)  < 0.001
Osteoporosis 278 (0.66%) 76 (0.68%) 80 (0.64%) 118 (0.66%) 4 (0.96%) 0.8711
Myocardial infarction 2,326 (5.53%) 629 (5.63%) 688 (5.50%) 994 (5.54%) 15 (3.59%) 0.3565
Congestive heart failure 307 (0.73%) 82 (0.73%) 89 (0.71%) 132 (0.74%) 4 (0.96%) 0.9476
Peripheral vascular disease 349 (0.83%) 93 (0.83%) 100 (0.80%) 152 (0.85%) 4 (0.96%) 0.9632
Cerebrovascular disease 1,077 (2.56%) 277 (2.48%) 322 (2.57%) 470 (2.62%) 8 (1.91%) 0.7410
Dementia 135 (0.32%) 36 (0.32%) 42 (0.34%) 56 (0.34%) 1 (0.28%) 0.9743
Chronic pulmonary disease 3,987 (9.48%) 1,063 (9.51%) 1,188 (9.50%) 1,700 (9.47%) 36 (8.61%) 0.9432
Rheumatic disease 437 (1.04%) 120 (1.07%) 128 (1.02%) 186 (1.04%) 3 (0.72%) 0.9010
Peptic ulcer disease 1,195 (2.84%) 306 (2.74%) 361 (2.89%) 513 (2.86%) 15 (3.59%) 0.7075
Hemiplegia or paraplegia 227 (0.54%) 63 (0.56%) 65 (0.52%) 98 (0.55%) 1 (0.24%) 0.8189
Renal disease 454 (1.08%) 126 (1.13%) 130 (1.04%) 195 (1.09%) 4 (0.96%) 0.9215
Any malignancy 109 (0.26%) 26 (0.23%) 36 (0.29%) 46 (0.26%) 1 (0.24%) 0.8694
Liver disease 5,897 (14.02%) 1,586 (14.19%) 1,742 (13.93%) 2,520 (14.03%) 49 (11.72%) 0.5358
AIDS/HIV 0 (0.00%) 0 (0.00%) 0 (0.00%) 0 (0.00%) 0 (0.00%) NA