Investigating N-3 Fatty Acids to prevent Neonatal Tobacco-related outcomeS (INFANTS): study protocol for a double-blind, randomized, placebo-controlled parallel clinical trial of n-3 polyunsaturated fatty acids in pregnant smokers

Table 1 Study assessments

Survey assessments
Construct	Measures
Tobacco-related variables	Fagerstrom Test of Nicotine Dependence (FTND-modified)
	Minnesota Nicotine Withdrawal Scale (MNWS)
	Questionnaire on Smoking Urges (QSU-Brief)
	Smoking Behaviors (Cigarettes per day, quit attempts, quit aides, etc)
Other substance use	Alcohol Use Disorders Identification Test (AUDIT-C)
Other substance use	Marijuana, cocaine, opioids, stimulants, drugs by injection (Veterans Aging Cohort Study-VACS, modified)
Psychological factors	Patient Health Questionnaire (PHQ-8)
	Generalized Anxiety Disorder (GAD-7)
	Connor-Davidson Resilience Scale (CD-RISC2)

ISSN: 1745-6215