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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 3 Effect of sex on all different measurements in each group of patients.

SexP value (*P<0.05)
(Mean±SD) (Min–Max)(Mean±SD) (Min–Max)
Vertical relationship ratio
 Non-RA2.14±0.10 (2.03–2.36)2.21±0.12 (2.04–2.34)0.135
 RA with BI1.72±0.32 (1.17–2.03)1.83±0.16 (1.50–2.16)0.741
 RA without BI2.15±0.07 (2.07–2.24)2.23±0.12 (2.02–2.56)0.111
Ranawat method
 Non-RA17.90±2.09 (15.03–23.26)16.99±1.42 (14.36–19.88)0.188
 RA with BI12.51±5.52 (3.52–21.98)11.99±3.03 (5.70–18.80)0.786
 RA without BI16.52±1.01 (15.47–17.78)16.55±2.17 (10.33–20.81)0.979
Modified Ranawat
 Non-RA35.40±2.61 (30.77–40.81)33.34±1.44 (31.92–36.81)0.016*
 RA with BI29.10±6.97 (18.08–39.96)26.98±3.20 (21.76–33.98)0.380
 RA without BI32.74±2.13 (29.06–35.30)32.67±2.81 (26.39–40.31)0.950
Redlund-Johnell line
 Non-RA43.02±5.47 (33.09–53.02)39.79±5.77 (32.36–51.40)0.114
 RA with BI36.38±6.44 (24.36–45.83)33.26±5.44 (19.56–43.08)0.175
 RA without BI44.19±3.79 (39.97–49.83)38.32±5.50 (27.31–49.51)0.018*
Non-RA – non-rheumatoid arthritis patients; RA with BI – rheumatoid arthritis patients with basilar invagination; RA without BI – rheumatoid arthritis patients without basilar invagination.
* Significance: value less than 0.05. Statistical analysis by independent-sample test.

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750