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

Table 4 Characteristics of study patients before and after propensity score analysis

		Before propensity score matching				After propensity score matching
Factors		RSLT (n = 34)	Typical LT (n = 8518)	P value	SMD1	RSLT (n = 22)	Typical LT (n = 22)	P value	SMD1
Age		62.9 ± 17.7	59.5 ± 16.2	0.2282	0.197	62.7 ± 17.1	59.9 ± 17.2	0.4113	0.156
Sex, n (%)	Men	21 (61.8)	4462 (52.4)	0.3054	0.193	11 (50)	11 (50)	1.0002	0
	Women	13 (38.2)	4056 (47.6)			11 (50)	11 (50)
GB, n (%)	LGB	25 (7.35)	28 (0.3)	< 0.0014	2.327	13 (59.1)	13 (59.1)	1.0002	0
	RGB	9 (26.5)	8490 (99.7)			9 (40.9)	9 (40.9)
Outcomes
Major PVA, n (%)						17 (77.3)	1 (4.5)	< 0.0015

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.

³Paired-t test.

⁴Chi-square test.

⁵Conditional logistic regression: Odds ratio = 16.27; 95% confidence interval: 2.25-117.53; P = 0.006.

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.