Determinants of magnetic resonance imaging overstaging in rectal cancer T-staging

Table 2 Multivariable logistic regression analysis of factors associated with magnetic resonance imaging, n (%)

Variable	Cases	Understaging	χ2	P value	Overstaging	χ2	P value
Reader experience			4.217	0.121	-	6.891	0.032
< 3 years	98	8 (8.2)			42 (42.9)
3-10 years	153	8 (8.2)			50 (32.7)
> 10 years	98	5 (5.1)			32 (32.7)
Specialty background			3.102	0.078	-	4.567	0.033
General radiologist	214	15 (7.0)			82 (38.3)
Abdominal imaging subspecialist	135	6 (4.4)			42 (31.1)
Receipt of specialized training			2.891	0.089	-	5.123	0.024
Yes	276	14 (5.1)			92 (33.3)
No	73	7 (9.6)			32 (43.8)
Reading duration (per case)			5.432	0.066	-	8.765	0.012
< 10 minutes	112	10 (8.9)			50 (44.6)
10-20 minutes	187	8 (4.3)			62 (33.2)
> 20 minutes	50	3 (6.0)			12 (24.0)
Blinded reading (without clinical information)			1.234	0.267	-	3.456	0.063
Yes	291	16 (5.5)			98 (33.7)
No	58	5 (8.6)			26 (44.8)
MDT participation			1.876	0.171	-	4.321	0.038
No (independent reading)	187	13 (7.0)			72 (38.5)
Yes	162	8 (4.9)			52 (32.1)

MDT: Multidisciplinary team.