Predicting portal venous anomalies by left-sided gallbladder or right-sided ligamentum teres hepatis: A large scale, propensity score-matched study

doi:10.3748/wjg.v29.i27.4344

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World Journal of Gastroenterology

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1007-9327

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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World J Gastroenterol. Jul 21, 2023; 29(27): 4344-4355
Published online Jul 21, 2023. doi: 10.3748/wjg.v29.i27.4344

Table 5 Characteristics of study patients before and after inverse probability of treatment weighting

		Before IPTW				After IPTW
Factors		RSLT (n = 34)	Typical LT (n = 8518)	P value	SMD¹	RSLT (n = 34)	Typical LT (n = 34)	P value	SMD¹
Age		62.9 ± 17.7	59.5 ± 16.2	0.228²	0.197	62.9 ± 17.7	62.3 ± 14.6	0.879	0.034
Sex, n (%)	Men	21 (61.8)	4462 (52.4)	0.305⁴	0.193	21 (61.8)	19.4 (58.1)	0.953³	0.076
Sex, n (%)	Women	13 (38.2)	4056 (47.6)	0.305⁴	0.193	13 (38.2)	14 (41.9)	0.953³	0.076
GB, n (%)	LGB	25 (7.35)	28 (0.3)	< 0.001⁴	2.327	25 (73.5)	24.4 (73.1)	1.0003	0.011
GB, n (%)	RGB	9 (26.5)	8490 (99.7)	< 0.001⁴	2.327	9 (26.5)	9 (26.9)	1.0003	0.011
Outcomes
Major PVA, n (%)						28 (82.4)	1.6 (4.7)	< 0.001⁴	2.514

¹Standardized mean difference (SMD). SMD indicate very small differences for values less than 0.10; 0.1-0.3. Small differences; 0.3-0.5, moderate differences; and values higher than 0.5, large differences.

²Student’s t test.

³McNemar test.

⁴Chi-square test.

IPTW: Inverse probability of treatment weighting; RSLT: Right-sided ligamentum teres; LT: Ligamentum teres; RGB: Right-sided gallbladder; LGB: Left-sided gallbladder; PVA: Portal venous anomalies; SMD: Standardized mean difference; GB: Gallbladder.

Citation: Lin HY, Lee RC, Chai JW, Hsu CY, Chou Y, Hwang HE, Liu CA, Chiu NC, Yen HH. Predicting portal venous anomalies by left-sided gallbladder or right-sided ligamentum teres hepatis: A large scale, propensity score-matched study. World J Gastroenterol 2023; 29(27): 4344-4355
URL: https://www.wjgnet.com/1007-9327/full/v29/i27/4344.htm
DOI: https://dx.doi.org/10.3748/wjg.v29.i27.4344