Table 1.

Sample characteristics for PATH sample at Wave 4

		N = 14,798
	n	% mean (SE)
Sexa
Male	7666	51.1 (0.005)
Female	7080	48.9 (0.005)
Raceb
White	9373	69.2 (0.013)
Black	2271	15.6 (0.010)
Other	2291	15.2 (0.007)
Hispanic ethnicityb
Non-Hispanic	9899	76.2 (0.013)
Hispanic	4374	23.8 (0.013)
Age (Wave 4)c
12 to 14 years	7337	49.7 (0.004)
15 to 17 years	7461	50.2 (0.004)
Household incomed
$9,999 or lower	1227	761 (0.005)
$10,000 to $24,999	2262	14.2 (0.005)
$25,000 to $49,999	3306	21.9 (0.005)
$50,000 to $99,000	3665	26.8 (0.006)
$100,000 or higher	3580	29.3 (0.011)
U.S. regione
Northeast	2050	16.4 (0.008)
Midwest	3246	21.3 (0.012)
South	5617	38.3 (0.015)
West	3885	23.8 (0.014)
Lifetime asthma diagnosisf
Parents indicated a diagnosis of asthma	2651	17.6 (0.004)
Past 30-day nicotine/tobacco/marijuana
useg
Past 30-day cigarette use (Wave 4)	459	3.1 (0.002)
Past 30-day e-cigarette use (Wave 4)	336	4.2 (0.002)
Past 30-day cannabis use (Wave 4)	577	4.7 (0.002)
Lifetime marijuana use (vaping)h
Lifetime vaping cannabis (Wave 4)	1283	8.9 (0.003)

Analyses used Stata version 15.0 (StataCorp LLC, College Station, Texas, USA).

Notes: N = Wave 4 of the PATH; n = unweighted sample size; percentages and standard errors (SE) incorporate longitudinal survey weights, stratum, and primary sampling unit.

Abbreviations: PATH, Population Assessment of Tobacco and Health (PATH) Study; SE, standard error.

^aSex was a derived variable from the interview and included “Male” or “Female” (i.e., PATH Study constructed the variable.)

^bRace/ethnicity was a derived variable from the interview and included “White alone”, “Black alone”, or “Other”. Hispanic was derived from the interview and included either “Hispanic” or “Not Hispanic”.

^cAge of respondent was a derived variable from the interview and included either “12 to 14 years old” or “15 to 17 years old”. No respondent “aged-out” of sample. At Wave 4, all respondents were ≤ 17 years.

^dHousehold income was a derived variable from the interview and included five categories: “less than $10,000”, “$10,000 to $24,999”, “$25,000 to $49,999”, “$50,000 to $99,999”, and “$100,000 or more”. The income listed at Wave 4 was used for the analysis.

^eRegion was a derived variable from the interview.

^fLifetime asthma diagnosis was derived from parents’ responses in Waves 1 through 4 to the following questions: “Child has ever been told by a doctor or other health professional that he/she has asthma” [Asked at Wave 1 and Wave 4] and “In the past 12 months, has {child’s first name} been told by a doctor, nurse or other health professional that {he/she} has asthma?” [Waves 1 through 4].

^gPast 30-day cigarette, e-cigarette, and cannabis use was determined by asking respondents the following questions at Wave 4 “In the past 30 days, on how many days did you smoke cigarettes?” and “In the past 30 days, on how many days did you use an e-cigarette?” Past 30-day cannabis use was determined by asking respondents the following question at Wave 4 “Have you used marijuana, hash, THC, grass, pot or weed in the past 30 days?” Past-30-day cigarette, e-cigarette, and marijuana use were all coded as binary variables.

^hLifetime cannabis use (vaping) was assessed at Wave 4 by asking respondents the following: “Have you ever used marijuana, marijuana concentrates, marijuana waxes, THC, or hash oils in an e-cigarete or other electronic nicotine product such as an e-cigarette, vape, mod, personal vaporizer, e-hookah, or hookah pen?” The response options included “Yes” and “No”.