Table 2. Effect Sizes at Baseline and 90 Days After SIP Entry for SIP Guests and Matched Controls.

Type of service	Mean (95% CI)		Cohen d (95% CI)a
	SIP hotel guest (n = 343)	Control (n = 343)
Emergency department visits, No.
Baseline	1.84 (1.52 to 2.17)	1.33 (1.39 to 1.58)	0.05 (–0.20 to 0.10)
3 mo	0.82 (0.66 to 0.99)	1.00 (0.80 to 1.20)	0.20 (0.04 to 0.34)
Inpatient days, No.
Baseline	4.00 (2.44 to 5.56)	2.27 (1.27 to 3.27)	0.17 (0.02 to 0.32)
3 mo	0.81 (0.40 to 1.23)	1.85 (1.06 to 2.65)	0.20 (0.05 to 0.35)
Inpatient stays, No.
Baseline	0.41 (0.30 to 0.51)	0.27 (0.19 to 0.34)	0.18 (0.03 to 0.33)
3 mo	0.14 (0.09 to 0.19)	0.22 (0.15 to 0.29)	0.18 (0.03 to 0.33)
Psychiatric emergency visits, No.
Baseline	0.03 (0.01 to 0.05)	0.02 (0.01 to 0.04)	0.08 (–0.07 to 0.23)
3 mo	0.01 (0.00 to 0.01)	0.02 (0.00 to 0.03)	0.18 (0.03 to 0.33)
Inpatient psychiatric stays, No.
Baseline	0.00 (0.00 to 0.01)	0.00 (0.00 to 0.01)	0.05 (–0.10 to 0.20)
3 mo	0.00 (0.00 to 0.00)	0.00 (0.00 to 0.00)	0.06 (–0.09 to 0.21)
Outpatient visits, No.
Baseline	0.45 (0.31 to 0.59)	0.25 (0.17 to 0.34)	0.21 (0.06 to 0.36)
3 mo	0.33 (0.22 to 0.45)	0.24 (0.15 to 0.32)	0.07 (–0.08 to 0.22)
Outpatient mental health visits, No.
Baseline	2.32 (1.24 to 3.40)	2.81 (1.52 to 4.11)	0.06 (–0.09 to 0.21)
3 mo	2.88 (1.47 to 4.29)	3.05 (1.56 to 4.54)	0.02 (–0.13 to 0.17)
Methadone maintenance and/or buprenorphine treatment visits, No.
Baseline	6.64 (1.93 to 11.36)	6.94 (2.02 to 11.87)	0.02 (–0.13 to 0.16)
3 mo	8.96 (2.42 to 15.51)	7.89 (2.12 to 13.67)	0.04 (–0.11 to 0.19)

Abbreviation: SIP, shelter-in-place.

^a Standardized difference d (Cohen d) interpretation: If the 95% CI spans 0, there is no difference in means (d < 0.2, very small effect; 0.2 ≤ d <0.5, small effect; 0.5 ≤ d <0.8, medium effect; and d ≥ 0.8, large effect).