Table 1.

Themes in social media research as identified by keyword search 2011–2017.

Broad theme	Substance use	Disease/diagnosis	Weight & activity	Psychiatry & mental health
Terms	Substance use/abuseAlcohol Smoking TobaccoMarijuanaOpioid/opiateHeroinCocaineMethamphetamineEcstasy/MDMAe-cigarettesLSDPrescription pillsStimulants	CancerOncologyCarcinomaSarcomaDiabetesHIVCardiovascular diseaseHypertensionHeart diseaseOsteoporosisVaccination/immunization	Physical activityWeight lossWeight gainObesitySedentary behavior	PsychiatryPsychologyMental healthDepressionPost-traumatic stress disorderAnxietySuicide/suicidalBipolar disorder