Table 1. Demographic and laboratory data of studied groups.
| Studied groups | ||||||||
| Patients (n=40) | Controls (n=40) | |||||||
| n | % | Mean±SD | n | % | Mean±SD | Test of significance | P | |
| Age (year) | 45.9±8.4 | 48.4±7.8 | t- test =1.36 | 0.17 | ||||
| Sex | C2=7.17 | 0.007 | ||||||
| Male | 36 | 90.0 | 26 | 65.0 | ||||
| Female | 4 | 10.0 | 14 | 35.0 | ||||
| Smoking | X2=0.81 | 0.37 | ||||||
| Smoker | 25 | 62.5 | 21 | 52.5 | ||||
| Non-smoker | 15 | 37.5 | 19 | 47.5 | ||||
| Disease duration (year) | 10.4±5.0 | - | - | |||||
| Total cholesterol level (mg/dL) | 157.3±18.7 | 156.4±11.5 | t= 0.27 | 0.78 | ||||
| Triglycerides (mg/dL) | 123.7±31.3 | 107.3±29.6 | t=2.41 | 0.02 | ||||
| High-density lipoproteins (mg/dL) | 42.2±6.1 | 43.0±6.2 | t=0.58 | 0.56 | ||||
| Low-density lipoproteins (mg/dL) | 99.7±11.7 | 103.3±10.1 | t=1.45 | 0.15 | ||||
| Vitamin D (ng/mL) | 16.9±4.0 | 20.3±3.6 | t=3.93 | <0.001 | ||||
| Vitamin D (ng/mL) | X2=5.49 | 0.01 | ||||||
| Deficient (<20) | 31 | 77.5 | 21 | 52.5 | ||||
| Insufficient (21-29) | 9 | 22.5 | 19 | 47.5 | ||||
| Carotid intima-media thickness (mm) | 0.6±0.1 | - | - | |||||
| BASDAI | 5.1±1.1 | - | - | |||||
| BASFI | 49.7±11.6 | - | - | |||||
| BASMI | 4.6±0.8 | - | - | |||||
| Visual analog scale | 7.0±1.1 | - | - | |||||
| SD: Standard deviation; BASDAI: Bath ankylosing spondylitis disease activity index; BASFI: Bath ankylosing spondylitis functional index; BASMI: Bath ankylosing spondylitis metrology index; VAS: χ2: Chi-squared test. | ||||||||