Table 3.

Content of Facebook posts and number of interactions by type of post

Topic	Number of Posts (N)	Topic Definition	Example Postsa	Comments Per Post (M ± SD)	Likes Per Post (M ± SD)	Total Interactions Per Post (M ± SD)b
Healthy Eating	97	Posts containing tips or recommendations for healthy eating.	“Eating healthy can be confusing sometimes. There are many foods that have a reputation for being healthy, but in reality they’re anything but. Here’s a little help…” “Here’s a healthy recipe for the warm temperatures: Grilled Corn, Avocado and Tomato Salad with Honey Lime Dressing.”	0.44 ± 0.83	1.13 ± 1.12	1.58 ± 1.53
Program Reminder	61	Reminders to attend the weekly group weight management or exercise classes.	“It’s a beautiful fall day and a great chance to come to exercise class! Reminder that exercise class is today at 1:30pm at the usual location, hope everyone can make it out!” “Members of Group 4 – just a reminder that your weekly classes are from 2:45–3:45 beginning tomorrow, with the weigh-in beginning at 2:30. See you tomorrow for a special guest presentation about local food resources! (Group 3 members, you are all welcome to stay after your class for Group 4’s session tomorrow, as well!)”	1.18 ± 1.29	1.12 ± 1.25	2.30 ± 1.96
Personal Sharing	58	Posts where participants shared personal successes or challenges with achieving health behavior change.	“Last week I lost a family member and went into a depression. I didn’t exercise and ate some stuff I shouldn’t have. But now I’m back and doing the best I can thank you for all the people that keep me going” “Sorry I quit. I have a lot more problems than weight loss. Please pray for me and my heeling, which is so much more important than weight loss. I wish for the best of most you. I have a lot more problems than weight loss.”	2.03 ± 2.39	1.72 ± 1.85	3.76 ± 3.15c
Humor	43	Posts containing cartoons or funny images.	“The older you get, the tougher it is to lose weight, because by then your body and your fat are really good friends.” [caption included with a cartoon] “My goal was to lose 10 pounds this year. Only 15 to go.” [quote included with an image]	0.40 ± 0.73	2.26 ± 1.56	2.65 ± 1.85
Exercise	26	Posts containing information about being physically active or getting exercise.	“I had a great time at exercise group today going on a walk. So good to see you all again. Will see you again Monday!” “Working out in the pool is a great way to get in shape without putting a lot of stress on your joints, but swimming laps can be hard and boring. Try these moves instead!”	1.62 ± 2.42	1.08 ± 1.06	2.69 ± 2.51
Community Events	22	Posts about events happening in the community such as charity walks, festivals, farmers markets, or Zumba classes held at a local park.	“There is an event to learn how to be healthy and fit. It is going to be on Saturday September 19th from 11am to 2pm at the Mall. Health and fitness experts will be there, and they will be doing health screenings and other activities.” “Latino Festival tomorrow. It sounds like a fun event. It is a short walk from Main street so a good way to get some steps in.”	0.82 ± 0.80	1.36 ± 0.85	2.18 ± 1.05
Motivation	17	Posts containing motivational or inspirational quotes or images.	“Though no one can go back and make a brand new start, anyone can start from now and make a brand new ending.” [quote included with an image] “When you start doubting yourself, remember how far you have come. Remember everything you have faced, all the battles you have won, and all the fears you have overcome.” [quote included with a photo]	0.47 ± 0.87	1.06 ± 0.90	1.53 ± 1.55

^aPersonally identifying information or details regarding the specific geographic location were removed from the sample posts to conceal participants’ identity.

^bUsing one-way ANOVA total interactions differed significantly between the different post topics (F=6.40, p<0.001).

^cAfter using a Bonferroni correction to account for multiple post-hoc pairwise comparisons, the Personal Sharing posts generated significantly more interactions compared to Program Reminder posts (p<0.01), Healthy Eating posts (p<0.001), and Motivation posts (p<0.01). There were no other significant differences in number of interactions between types of posts.