Table 1:

Participant Characteristics

	Number	X-waiver	No X-waiver	p-value
PHYSICIAN CHARACTERSTICS
Age
Less than 30	24 (29%)	2	22
30–39	35 (42%)	9	26
40–49	15 (18%)	6	9
50–59	7 (8%)	1	6
Over 60	3 (4%)	0	3	p=0.149
Sex
Female	32 (38%)	5	27
Male	52 (62%)	13	39	p=0.309
Ethnicity
Hispanic/Latino	4 (5%)	0	4
Non-Hispanic/Latino	80 (95%)	18	62	p=0.573
Race
White	62 (74%)	13	49
Black/African American	0 (0%)	0	0
Asian	13 (15%)	4	9
Other	9 (11%)	1	8	p= 0.561
Level of Training
Intern	8 (10%)	0	8
Resident	29 (35%)	4	25
Attending	47 (56%)	14	33	p=0.077
PGY5–9	18 (21%)
PGY10–14	9 (11%)
PGY15+	20 (24%)
Percent Time in Clinical Care
Less than 20%	2 (2%)	1	2
20–50%	10 (12%_	1	9
51–75%	10 (12%_	3	7
Greater than 75%	61 (73%)	13	48	p=0.690
Close friend/family with SUD
Yes	24 (29%)	6	18	p= 0.668
PRACTICE CHARACTERISTICS
X-waiver training completed
Yes	18 (21%)	n/a	n/a	n/a
Ordered Naloxone in past 3 months
Yes	39 (46%)	12	27	p=0.052
Ordered Buprenorphine for a patient in past 3 months
Yes	28 (33%)	8	20	p=0.259

^*Includes physicians who had an X-waiver (X-waiver) and those who had recently completed training but had not yet obtained an X-waiver (No X-waiver)

^**p-value for comparison of X-waivered vs non X-waivered physicians done using chi² tests (p<0.05)