18 February 2024: Clinical Research
Vertical Relationship Ratio (VRR): A High Reliability and Accuracy Radiographic Measurement for Basilar Invagination in Rheumatoid Arthritis
Monchai Ruangchainikom 1ABDEF , Ekkapoj Korwutthikulrangsri 1E , Apisit Rattanatanasarn 1C , Ishthayapong Kanjanakeereewong 1C , Win Boonsirikamchai 2C , Panlop Tirawanish 3C , Surin Thanapipatsiri 1A , Werasak Sutipornpalangkul 1ADE*DOI: 10.12659/MSM.943329
Med Sci Monit 2024; 30:e943329
Table 1 Demographic data and different measurement parameters in each group of patients.
| Non-RA (n=56) | RA with BI (n=28) | RA without BI (n=37) | P value | |
|---|---|---|---|---|
| Male | 23 (65.7%) | 10 (33.3%)* | 6 (16.7%)** | a |
| Female | 12 (34.3%) | 20 (66.7%) | 30 (83.3%) | |
| Mean±SD | 39.80±14.56 | 59.00±11.85* | 57.06±15.61** | b |
| Median (range) | 42.00 (18–68) | 60.00 (39–89) | 58.00 (23–90) | |
| Vertical relationship ratio | ||||
| Median (range) | 2.12 (2.03–2.36) | 1.84 (1.17–2.16)* | 2.24 (2.02–2.56)*** | c |
| Mean±SD | 2.16±0.11 | 1.79±0.23 | 2.22±0.12 | |
| Ranawat method (mm) | ||||
| Median (range) | 17.14 (14.36–23.26) | 11.81 (3.52–21.98)* | 16.92 (10.33–20.81)*** | |
| Mean±SD | 17.59±1.92 | 12.16±3.94 | 16.54±2.01 | c |
| Modified Ranawat (mm) | ||||
| Mean±SD | 34.69±2.46 | 27.68±4.78* | 32.68±2.69,** | b |
| Range | 30.77–40.81 | 18.08–39.96 | 26.39–40.31 | |
| 95% CI | 33.85–35.54 | 25.90–29.47 | 31.77–33.59 | |
| Redlund-Johnell line (mm) | ||||
| Mean±SD | 41.91±5.70 | 34.30±5.87* | 39.30±5.67*** | b |
| Range | 32.36–53.02 | 19.56–45.83 | 27.31–49.83 | |
| 95% CI | 39.95–43.87 | 32.11–36.49 | 37.38–41.21 | |
| Non-RA – non-rheumatoid arthritis patients, RA with BI – rheumatoid arthritis patients with basilar invagination, RA without BI – rheumatoid arthritis patients without basilar invagination. * , , have value less than 0.05, * Non-RA group vs RA with BI group, ** Non-RA group vs RA without BI group, *** RA with BI vs RA without BI. Statistical analysis by a chi-square test, b One-way ANOVA, c Kruskal-Wallis test. | ||||