Table 3. Hazard Ratios (95% CIs) for Different Outcomes of Age of Cigarette Initiation Stratified by Sex and Race/Ethnicity^a.

Characteristic	Susceptibility to use	Ever use	Past 30-d use	Fairly regular use
Sex
Girls	1 [Reference]	1 [Reference]	1 [Reference]	1 [Reference]
Boys	0.98 (0.91-1.07)	1.21 (1.08-1.36)	1.27 (1.10-1.47)	1.21 (0.97-1.50)
Race/ethnicity
Non-Hispanic White	1 [Reference]	1 [Reference]	1 [Reference]	1 [Reference]
Non-Hispanic Black	0.77 (0.68-0.88)	0.59 (0.49-0.71)	0.64 (0.52-0.77)	0.25 (0.14-0.43)
Non-Hispanic otherb	1.08 (0.93-1.25)	0.72 (0.59-0.88)	0.77 (0.63-0.95)	0.67 (0.48-0.95)
Hispanic	0.98 (0.89-1.08)	0.92 (0.80-1.05)	0.82 (0.69-0.96)	0.64 (0.47-0.87)

^aPopulation Assessment of Tobacco and Health (PATH) Study data reprinted with permission from the United States Department of Health and Human Services.¹⁸ Restricted file received disclosure to publish: February 10, 2020; February 17, 2020; February 28, 2020; March 06, 2020; May 01, 2020.

^bNon-Hispanic other indicates non-Hispanic Asian participants, multirace/ethnicity, etc.