Table 1.

Tweet Content: Definitions, Descriptive Information, Intercoder Reliability, and Examples.

Variable	Definition	Descriptive Information (n, % of Total)	Intercoder Reliabilitya	Example Tweetsb
Awareness	Fundraising, cancer prevalence, colors (pink), general research.	636, 38.4%	α = 0.84	RT @name: WEAR YELLOW TO TOMORROW’S HOME FOOTBALL GAME IN SUPPORT OF CHILDHOOD CANCER The brain cancer walk is tom in Audubon Park Shelter 10 @ 8am! If you didn’t register, you can register there starting at 7am! #AshleysArmy
Risk and prevention	Risk factors (eg, smoking), prevention behaviors, research.	130, 6.5%	α = 0.92	Fruit and veg! #prevent #cancer! @name @name @name https:\t.col1s7FSEXfE RT @name: Being physically active decreases the risk of these cancers.. #exercise #Healing #cancer #Fitness #Health #Wellness https:\u2026
Early detection	Symptoms, signs, tests (eg, PSA test), research.	278, 16.8%	α = 0.91	RT @name Early Signs Of The Silent Killer Ovarian Cancer…https:\t.coiMusD5esmT Thankful my dad got the PSA test…@name opens up about prostate cancer diagnosis. https:\t.coTQvdkwsHNF
Diagnosis	Personal experience and research.	82, 5.0%	α = 0.75	RT @name: When your child has cancer, you go into survival mode. A mom reflects on her child’s #pediatriccancer diagnosis RT @Maddieee_Dianne: Today was pink out day for breast cancer. Last week my aunt was diagnosed with stage three. Everyone keep her in you2026
Treatment	People in/remembering treatment and research.	382, 23.1%	α = 0.82	Praying for my grandma to have a successful surgery for her breast cancer tomorrow RT @name: This teacher has cancer and 400+ students came to sing outside his house, this is so beautiful https:\t.coOBQLMizba1
Survivorship	Messages about life after treatment, includes research.	100, 6.0%	α = 0.85	Today, on the way home from finding out that my cancer is still in remission I almost pulled out in front of a speeding fire truck. Typical. RT @name: Combined #aerobic and #resistance training improves #bone #health of female cancer survivors https:\t.coM8F7rzmMKAhttpu2026 RT @name _Bang: Cancer took both heads of my family tree #FvckCancer https:\t.coQhbg6spLGN
End of life	Information, experiences, and research related to death.	73, 4.4%	α = 1	Rest In Peace, abuelita Licha. Breast cancer took u from us way too soon, I’ll forever have u looking over us. ud83dudc97u2026 https:\t.cokBb1B8VyEG

Abbreviation: PSA, prostate-specific antigen.

^a Intercoder reliability was measured using Krippendorff α.²⁰

^b Account names have been anonymized.