Table 2.

Univariable analyses of MRI features between PHEOs and non‑PHEOs

Variables	PHEO (n = 35)	non-PHEO(n = 27)	P value	OR	95%CI
T1-IP	129.63 ± 97.29	169.63 ± 128.39	0.185	0.997	0.992–1.002
T1-OP	115.69 ± 90.65	113.30 ± 110.47	0.924	1.000	0.995–1.005
Chemical shift	13.95 ± 11.03	56.07 ± 54.04	< 0.001	0.932	0.897–0.968
Chemical shift index	11.54 ± 6.85	35.40 ± 20.19	< 0.001	0.884	0.830–0.942
ASR	0.820 ± 1.100	0.771 ± 0.270	0.335	3.682	0.261–52.012
T2SI	657.80 ± 250.40	417.56 ± 149.21	0.001	1.006	1.003–1.010
T2SI-ratio	3.33 ± 1.38	1.77 ± 0.37	< 0.001	20.553	3.881-108.837
T2-spair	478.80 ± 217.61	310.96 ± 147.68	0.003	1.007	1.002–1.010
ADC	1515.51 ± 441.25	1154.93 ± 188.62	0.001	1.003	1.001–1.005
b1000	305.11 ± 165.53	248.48 ± 112.82	0.141	1.003	0.999–1.007

Imaging features of PHEO and non-PHEO lesions. Data are means ± standard deviation. p < 0.05 indicate a significant difference between lesions. T1-IP, T1-weighted images in-phase signal intensity; T1-OP, T1-weighted images opposed-phase signal intensity; Chemical shift, T1-IP subtract T1-OP; T2SI: T2-weighted images signal intensity; Chemical shift index, (T1-IP–T1-OP)/ T1-IP*100; ASR = (SI lesion OP/SI spleen OP)/ (SI lesion IP/SI spleen IP); T2-weighted images signal intensity; T2SI-ratio, T2SI nodule /T2SI muscle