Table 2.

Descriptive Outcome Variable Comparisons

Variable	Group 1: Stress/Anxiety (n = 67)		Group 2: No Stress/Anxiety (n = 778)
	Median (IQR)	Mean or n (%) [95% CI]	Median (IQR)	Mean or n (%) [95% CI]
Ultralow (<2.5%) probability for ACS	—	33 (49.3) [37.4–61.2)	—	403 (51.8) [48.3–55.3]
Proportion diagnosed with ACS	—	0 (0)	—	1 (0.2) [0–0.6%]
Ultralow (<2.5%) probability for PE	—	31 (46.3) [34.4–58.2]	—	268 (34.4) [31.1–37.7]
Proportion diagnosed with PE	—	0 (0)	—	1 (0.4) [0–1.2]
Total radiation dose from chest imaging within 90 days, mSv*	0.06 (0.06–8.02)	3.06 [1.78–4.34]	0.12 (0.06–8.06)	5.03 [4.14–5.92]
Chest radiation >5 mSv*		18 (27.2) [16.5–37.9]		296 (38.6) [35.2–42]
Total medical cost within 30 days, $†‡	790 (560–2,144)	2,609 [1,592–3,626]	1,408 (631–3,119)	3,587 [2,954–4,221]
90-Day ED returns	—	17 (25.4) [15.0–35.8]	—	200 (25.7) [22.6–28.8]
90-Day observation admissions	—	0 (0.0)	—	13 (1.7) [1.0–2.6]
90-Day inpatient admissions	—	2 (2.9) [1.8–4.0]	—	81 (10.4) [8.3–12.5]

ACS = acute coronary syndrome; ED = emergency department; IQR = interquartile range; PE = pulmonary embolism.

^*Subjects with missing radiation data (1 and 11 for groups 1 and 2, respectively).

^†Does not include professional charges.

^‡Subjects with missing cost data (0 and 21 for groups 1 and 2, respectively).