Vertical Relationship Ratio (VRR): A High Reliability and Accuracy Radiographic Measurement for Basilar Invagination in Rheumatoid Arthritis

Monchai Ruangchainikom; Ekkapoj Korwutthikulrangsri; Apisit Rattanatanasarn; Ishthayapong Kanjanakeereewong; Win Boonsirikamchai; Panlop Tirawanish; Surin Thanapipatsiri; Werasak Sutipornpalangkul

doi:10.12659/MSM.943329

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

Authors information Article notes Copyright and License information

Background Material and Methods Results Discussion Conclusions References

Related articles Order reprints Share article Share by email

View HTML version

Table 2 Intra- and inter-observer reliability of different measurements in each group of patients.

	Intra-observer reliability				Inter-observer reliability
	Rater 1		Rater 2
	Mean±SD	ICC (95% CI)	Mean±SD	ICC (95% CI)
	Median (range)	ICC (95% CI)	Median (range)	ICC (95% CI)
Vertical relationship ratio
Non-RA	2.17±0.11	0.96 (0.91, 0.98)	2.15±0.12	0.92 (0.84, 0.96)	0.86 (0.75–0.93)
Non-RA	2.16 (2.03–2.37)		2.11 (2.01–2.36)
RA with BI	1.78±0.22	0.97 (0.94, 0.99)	1.80 ±0.24	0.96 (0.91, 0.98)	0.97 (0.93, 0.98)
RA with BI	1.81 (1.16–2.16)	0.97 (0.94, 0.99)	1.84 (1.19–2.17)	0.96 (0.91, 0.98)	0.97 (0.93, 0.98)
RA without BI	2.20±0.11	0.98 (0.95, 0.99)	2.23 ±0.14	0.91 (0.84,0.96)	0.89 (0.80, 0.95)
RA without BI	2.22 (2.03–2.53)	0.98 (0.95, 0.99)	2.24 (2.01–2.59)	0.91 (0.84,0.96)	0.89 (0.80, 0.95)
Ranawat method
Non-RA	17.57±1.63	0.60 (0.34, 0.78)	17.61±2.35	0.68 (0.46–0.83)	0.80 (0.63–0.89)
Non-RA	17.46 (14.85–20.69)		17.32 (13.79–26.46)
RA with BI	12.35±3.98	0.89 (0.78, 0.95)	11.97 ±4.09	0.96 (0.91, 0.98)	0.91 (0.82, 0.96)
RA with BI	12.25 (4.30–20.59)	0.89 (0.78, 0.95)	11.69 (2.74–23.36)	0.96 (0.91, 0.98)	0.91 (0.82, 0.96)
RA without BI	16.57±2.06	0.88 (0.78, 0.94)	16.51 ±2.05	0.80 (0.64, 0.89)	0.92 (0.85, 0.96)
RA without BI	17.00 (10.32–20.16)	0.88 (0.78, 0.94)	16.95 (10.34–21.46)	0.80 (0.64, 0.89)	0.92 (0.85, 0.96)
Modified Ranawat method
Non-RA	35.37±2.59	0.79 (0.63, 0.89)	34.37±2.51	0.78 (0.60, 0.88)	0.86 (0.74, 0.93)
Non-RA	34.62 (30.68–41.39)		34.03 (30.09–40.23)
RA with BI	27.87±4.82	0.98 (0.97, 0.99)	27.50±4.79	0.97 (0.95, 0.99)	0.98 (0.96, 0.99)
RA with BI	27.72 (18.17–38.94)	0.98 (0.97, 0.99)	26.90 (17.99–40.97)	0.97 (0.95, 0.99)	0.98 (0.96, 0.99)
RA without BI	32.86±2.77	0.97 (93, 0.98)	32.50±2.65	0.97 (0.94, 0.99)	0.96 (0.92, 0.98)
RA without BI	33.30 (26.59–40.41)	0.97 (93, 0.98)	33.03 (26.19–40.22)	0.97 (0.94, 0.99)	0.96 (0.92, 0.98)
Redlund-Johnell line
Non-RA	41.85±5.72	0.96 (0.93, 0.98)	41.97±5.74	0.99 (0.98, 0.99)	0.98 (0.96, 0.99)
Non-RA	41.72 (32.06–52.41)		41.75 (32.67–53.64)
RA with BI	34.57±6.09	0.98 (0.96, 0.99)	34.02±5.90	0.99 (0.99, 0.99)	0.92 (0.84, 0.96)
RA with BI	35.31 (18.94–46.48)	0.98 (0.96, 0.99)	33.54 (20.17–45.47)	0.99 (0.99, 0.99)	0.92 (0.84, 0.96)
RA without BI	39.35 ±5.73	0.98 (0.96, 0.99)	39.25 ±5.69	0.98 (0.96, 0.98)	0.97 (0.94, 0.98)
RA without BI	40.17 (25.83–50.24)	0.98 (0.96, 0.99)	39.82 (28.22–49.51)	0.98 (0.96, 0.98)	0.97 (0.94, 0.98)
ICC – intraclass correlation coefficient; Non-RA – non-rheumatoid arthritis patients; RA with BI – Rheumatoid arthritis patients with basilar invagination; RA without BI – rheumatoid arthritis patients without basilar invagination. Statistical analysis by using intraclass coefficient (ICC) scores with 95% confidence intervals.

Back to the Article

Vertical Relationship Ratio (VRR): A High Reliability and Accuracy Radiographic Measurement for Basilar Invagination in Rheumatoid Arthritis

Your Privacy