Table 1:

Univariable Analysis of Factors Affecting Follow-Up Recommendations by Department

Predictor	Entire Cohort of Radiology Reports	Reports Containing Follow-Up Recommendations	Odds Ratio (95% CI)	P-value
Overall	318,366	38,745 (12.2%)
Patient Factors
Age, Mean Years (SD)	59.0 (SD: 17.4)	60.3 (SD: 17.4)	1.01 (1.01–1.01)	<0.01*
Women	Reference
Men	143,767 (45.2%)	16,573 (42.8%)	0.9(0.9–1.0)	<0.01*
Radiologist Factors
Women	Reference
Men	145,085 (45.6%)	19,246 (49.7%)	1.2 (0.8–1.6)	<0.01*
Trainee, Absent	Reference
Trainee, Present	152,749 (48.0%)	23,168 (59.8%)	1.7 (1.7–1.8)	<0.01*
Unique Attendings	65	65	1.00	<0.01*
Years in Practice
1–10	Reference
11+	227,834 (71.6%)	27,071 (69.9%)	0.91 (0.9–0.9)	<0.01*
Division
Neuroradiology	Reference
Abdomen	23,535 (7.4%)	4,917 (12.7%)	1.3(1.3–1.4)	<0.01*
Chest	84,354 (26.5%)	5,078 (13.1%)	0.3(0.3–0.3)	<0.01*
Cancer Institute	36,561 (11.5%)	6,712 (17.3%)	1.2(1.1–1.2)	<0.01*
Emergency Radiology	76,339 (24.0%)	11,084 (28.6%)	0.9(0.8–0.9)	<0.01*
Musculoskeletal	57,793 (18.2%)	4,461 (11.5%)	0.4(0.4–0.5)	<0.01*
Modality
X-Ray	Reference
Ultrasound	8037 (2.5%)	700 (1.8%)	1.6(1.5–1.7)	<0.01*
CT	100,050 (31.4%)	21,650 (55.9%)	4.6(4.5–4.7)	<0.01*
MR	42,959 (13.5%)	6,913 (17.8%)	3.2(3.1–3.3)	<0.01*

^*Statistically significant; CI=Confidence Interval; SD=Standard Deviation