Development and external validation of a radiomics model for assessment of HER2 positivity in men and women presenting with gastric cancer

Insights into Imaging

Table 4 The performance of the radiomic nomogram in stratified analysis

Patient types		AUC	95%CI		p value
Patient types		AUC	Lower	Upper	p value
Gender	Male	0.710	0.668	0.752	0.802
Gender	Female	0.720	0.652	0.789	0.802
Age	> 60 y	0.710	0.662	0.759	0.730
Age	≤ 60 y	0.723	0.671	0.775	0.730
Location	Cardia	0.683	0.633	0.734	0.556
Location	Non-cardia	0.706	0.650	0.762	0.556
IHC results	IHC 2+	0.658	0.539	0.776	0.291
IHC results	IHC others	0.725	0.687	0.763	0.291
Type of tissue for confirmation	Biopsy tissue	0.699	0.645	0.754	0.319
Type of tissue for confirmation	Surgical specimen	0.736	0.690	0.782	0.319

AUC = area under the receiver operating characteristic curve; CI = confidence interval; IHC = immunohistochemistry