Demographics and baseline severity scores of younger (<65 years) and elderly (≥65 years) patients
| Younger patients (<65 years) | Elderly patients (≥65 years) | p Value | |
|---|---|---|---|
| Demographics | |||
| Age (years) | 51.32±8.77 | 71.63±5.34 | <0.0001 |
| Gender (%) | 65.00 M, 35.00 F | 63.87 M, 36.13 F | 0.82 |
| Duration of symptoms (months) | 27.40±35.34 | 25.96±32.68 | 0.82 |
| Smoker (%) | 32.78 Y, 67.22 N | 10.92 Y, 89.08 N | <0.0001 |
| Comorbidities (%) | 53.76 Y, 46.24 N | 78.15 Y, 21.85 N | <0.0001 |
| Comorbidity score | 1.13±1.51 | 2.15±2.13 | <0.0001 |
| Number of comorbidities | 1.00±1.25 | 1.74±1.31 | <0.0001 |
| Diabetes (%) | 9.44 Y, 90.56 N | 21.85 Y, 78.15 N | 0.0004 |
| Cardiovascular (%) | 36.49 Y, 63.51 N | 64.71 Y, 35.29 N | <0.0001 |
| Respiratory (%) | 7.54 Y, 92.46 N | 12.61 Y, 87.39 N | 0.09 |
| Gastrointestinal (%) | 15.08 Y, 84.92 N | 15.13 Y, 84.87 N | 0.99 |
| Renal (%) | 1.40 Y, 98.60 N | 4.20 Y, 95.80 N | 0.13 |
| Psychiatric (%) | 9.22 Y, 90.78 N | 4.20 Y, 95.80 N | 0.08 |
| Rheumatological (%) | 1.68 Y, 98.32 N | 6.72 Y, 93.28 N | <0.001 |
| Neurological (%) | 3.63 Y, 96.37 N | 6.72 Y, 93.28 N | 0.15 |
| Baseline functional status | |||
| mJOA | 12.86±2.76 | 11.41±2.89 | <0.0001 |
| Nurick | 3.16±1.21 | 3.75±1.23 | <0.0001 |
| Baseline quality of life | |||
| Neck Disability Index | 37.52±19.59 | 39.15±22.31 | 0.70 |
| SF36v2 Physical Functioning | 32.51±11.94 | 28.47±12.18 | <0.001 |
| SF36v2 Role Limitation Physical | 29.46±10.65 | 28.90±12.14 | 0.24 |
| SF36v2 Bodily Pain | 35.96±10.75 | 38.05±12.52 | 0.15 |
| SF36v2 General Health | 41.16±10.36 | 41.12±9.96 | 0.91 |
| SF36v2 Emotional Well-being | 38.35±12.93 | 40.95±12.78 | 0.06 |
| SF36v2 Role Limitation Emotional | 31.68±14.27 | 31.62±16.35 | 0.93 |
| SF36v2 Social Functioning | 35.98±12.86 | 34.89±13.00 | 0.41 |
| SF36v2 Energy/Fatigue | 42.59±11.09 | 43.56±11.16 | 0.38 |
| SF36v2 Physical Component Score | 34.69±9.03 | 32.90±8.91 | 0.048 |
| SF36v2 Mental Component Score | 38.94±13.10 | 40.79±12.94 | 0.16 |
Means were compared using the appropriate t test and frequencies were compared using the χ2 test.
mJOA, modified Japanese Orthopaedic Association scale.