. 2019 Feb 20;5(1):e11313. doi: 10.2196/11313

Table 4.

Substance use behaviors of men who have sex with men in the American Men's Internet Survey, United States, 2016.

Participant characteristics			Participants (N)		Substance use behaviors in the past 12 months
					Used marijuana				Used methamphetamines				Used other substance(s)
					n (%)		P value^a		n (%)		P value^a			n (%)		P value^a
HIV positive			1098		308 (28.05)		<.001^b		126 (11.48)		<.001^b			303 (27.60)		<.001^b
	Race/ethnicity
		Black, non-Hispanic		248		66 (26.61)		.52		16 (6.45)		.02			52 (20.97)		.04
		Hispanic		130		40 (30.77)		.98		22 (16.92)		.12			44 (33.85)		.21
		White, non-Hispanic		632		176 (27.85)		Ref^a		75 (11.87)		Ref^a			183 (28.96)		Ref^a
		Other or multiple races		88		26 (29.55)		.96		13 (14.77)		.45			24 (27.27)		.64
	Age (years)
		15-24		59		22 (37.29)		.29		5 (8.47)		.51			21 (35.59)		.60
		25-29		97		33 (34.02)		.80		10 (10.31)		.72			41 (42.27)		.03
		30-39		186		71 (38.17)		.18		33 (17.74)		.03			65 (34.95)		.96
		≥40		756		182 (24.07)		Ref^a		78 (10.32)		Ref^a			176 (23.28)		Ref^a
	NHBS^c city resident
		Yes		568		174 (30.63)		.10		78 (13.73)		.11			175 (30.81)		.04
		No		530		134 (25.28)		Ref^a		48 (9.06)		Ref^a			128 (24.15)		Ref^a
	Recruitment type
		Gay social networking		139		36 (25.90)		.98		17 (12.23)		.93			34 (24.46)		.56
		General gay interest^d		<5		N/A^e		N/A		N/A		N/A			N/A		N/A
		General social networking		651		170 (26.11)		Ref^a		50 (7.68)		Ref^a			153 (23.50)		Ref^a
		Geospatial social networking		303		100 (33.00)		.35		57 (18.81)		.007			113 (37.29)		.01
HIV negative or unknown status			9068		2266 (24.99)		Ref^a		196 (2.16)		Ref^a			1652 (18.22)		Ref^a
	Race/ethnicity
		Black, non-Hispanic		631		126 (19.97)		.006		8 (1.27)		.049			86 (13.63)		.001
		Hispanic		1181		344 (29.13)		.04		37 (3.13)		.03			275 (23.29)		<.001
		White, non-Hispanic		6441		1597 (24.79)		Ref^a		128 (1.99)		Ref^a			1152 (17.89)		Ref^a
		Other or multiple races		815		199 (24.42)		.33		23 (2.82)		.12			139 (17.06)		.27
	Age (years)
		15-24		2659		886 (33.32)		<.001		37 (1.39)		.03			548 (20.61)		.001
		25-29		1596		500 (31.33)		<.001		35 (2.19)		.60			388 (24.31)		.18
		30-39		1228		322 (26.22)		.74		42 (3.42)		.04			270 (21.99)		<.001
		≥40		3585		558 (15.56)		Ref^a		82 (2.29)		Ref^a			446 (12.44)		Ref^a
	NHBS^c city resident
		Yes		3656		1024 (28.01)		<.001		94 (2.57)		.48			779 (21.31)		<.001
		No		5412		1242 (22.95)		Ref^a		102 (1.88)		Ref^a			873 (16.13)		Ref^a
	Recruitment type
		Gay social networking		1119		201 (17.96)		.71		37 (3.31)		.13			150 (13.40)		.68
		General gay interest		73		16 (21.92)		.55		1 (6.25)		.48			12 (16.44)		.52
		General social networking		6125		1572 (25.67)		Ref^a		90 (1.47)		Ref^a			1068 (17.44)		Ref^a
		Geospatial social networking		1731		473 (27.33)		.11		68 (3.93)		.08			419 (24.21)		<.001

^aWald chi-square from multivariable logistic regression comparing behavior (yes vs no) between groups with specific characteristics and a reference (Ref) group.

^bWald chi-square from multivariable logistic regression comparing behavior (yes vs no) between HIV-positive participants and HIV-negative or unknown-serostatus participants. Model controlled for race/ethnicity, age, National HIV Behavioral Surveillance system residency, and website type.

^cNHBS: National HIV Behavioral Surveillance.

^dTo prevent identification, data for groups with less than five participants are not presented.

^eN/A: not applicable.