Appendix 6.

Practice behavior (theoretical domains framework (TDF)), n = 77.^a

TDF domain		Baseline		Absolute change Baseline to 2 weeks					Absolute change Baseline to 3 months
Question #		Mean	SD	Mean	SD	95% CI		p Value	Mean	SD	95% CI		p Value
Knowledge
1	I am aware of the content and objectives of the Facebook group page	2.58	1.21	1.58	1.28	1.29	1.88	0.00	1.52	1.31	1.22	1.82	0.00
2	I know the content and objectives of the Facebook group page	2.26	1.07	1.69	1.23	1.41	1.97	0.00	1.74	1.23	1.46	2.02	0.00
3	I am familiar with the content and objectives of the Facebook group page	2.27	1.10	1.60	1.26	1.31	1.88	0.00	1.77	1.23	1.49	2.05	0.00
4	I am aware of how to use the Facebook group page to disseminate PGrip with patients	2.29	1.22	1.58	1.27	1.30	1.87	0.00	1.69	1.35	1.38	1.99	0.00
Skills
5	I have the skills to use the Facebook group page to disseminate PGrip with patients	3.40	1.34	0.74	1.23	0.46	1.02	0.00	0.69	1.34	0.38	0.99	0.00
6	I have practiced using the Facebook group page to disseminate PGrip with patients	1.73	0.87	0.94	1.34	0.63	1.24	0.00	1.53	1.28	1.24	1.82	0.00
Social/professional role and identity
7	Using the Facebook group page to disseminate PGrip with patients is part of my work as an arthritis health professional	2.34	0.94	0.36	1.01	0.13	0.59	0.00	0.56	1.01	0.33	0.79	0.00
8	As an arthritis health professional, it is my job to use the Facebook group page to disseminate PGrip with patients	2.34	1.05	0.14	1.16	–0.12	0.41	0.28	0.31	1.03	0.08	0.55	0.01
9	It is my responsibility as an arthritis health professional to use the Facebook group to disseminate PGrip with patients	2.45	1.06	0.14	1.43	–0.18	0.47	0.38	0.34	1.02	0.11	0.57	0.01
10	Using the Facebook group page to disseminate PGrip with patients is consistent with my job as a health professional	3.00	0.99	–0.40	1.44	–0.73	–0.07	0.02	0.42	1.13	0.16	0.67	0.00
Optimism
11	I am confident that I can use the Facebook group page to disseminate PGrip with patients even when there is little time	3.10	0.94	0.05	1.00	–0.17	0.28	0.65	–0.04	1.19	–0.31	0.23	0.77
12	I am confident that if I wanted I could use the Facebook group page to disseminate PGrip with patients	3.64	1.00	0.27	1.06	0.03	0.51	0.03	0.21	1.10	–0.04	0.46	0.10
13	With regard to using the Facebook page to disseminate PGrip with patients in uncertain times, I usually expect the best	3.19	0.81	0.27	0.79	0.09	0.45	0.00	0.30	0.93	0.09	0.51	0.01
14	With regard to using the Facebook group page to disseminate PGrip with patients I'm always optimistic about the future	3.56	0.80	0.12	0.76	–0.06	0.29	0.18	0.25	0.89	0.04	0.45	0.02
Beliefs about consequences
15	If I use the Facebook page to disseminate PGrip with patients, it will benefit public health	3.68	0.87	0.23	0.83	0.05	0.42	0.02	0.18	0.94	–0.03	0.40	0.09
16	If I use the Facebook group page to disseminate PGrip with patients, it will not have disadvantages for my relationship with them	3.42	0.91	0.19	0.96	–0.02	0.41	0.08	0.27	1.03	0.04	0.51	0.02
Intentions
17	For how many of the next 10 patients do you intend to use the Facebook group page to disseminate PGrip?	2.64	1.51	0.09	1.23	–0.19	0.37	0.52	0.29	1.46	–0.05	0.62	0.09
18	I will definitely use the Facebook group page to disseminate PGrip with patients	3.12	0.84	0.14	0.94	–0.07	0.36	0.19	0.14	0.97	–0.08	0.36	0.20
19	I intend to use the Facebook group page to disseminate PGrip with patients	3.32	0.90	0.29	0.97	0.07	0.51	0.01	0.19	0.97	–0.03	0.42	0.08
20	How strong is your intention to use the Facebook group page to disseminate PGrip with patients?	3.10	1.02	0.12	1.09	–0.13	0.36	0.35	–0.08	1.16	–0.34	0.18	0.56
Memory/attention /decision
21	How often do you forget to use the Facebook group page to disseminate PGrip with patients?	1.92	1.00	0.58	1.15	0.32	0.85	0.00	0.73	1.24	0.45	1.01	0.00
22	When I need to concentrate to use the Facebook group page to disseminate PGrip with patients, I have no trouble focusing my attention	3.26	0.75	0.36	0.89	0.16	0.57	0.00	0.44	0.88	0.24	0.64	0.00
23	When trying to focus my attention on using the Facebook group page to disseminate PGrip with patients, I have no difficulty blocking out distracting thoughts	3.29	0.84	0.44	0.85	0.25	0.63	0.00	0.55	0.93	0.34	0.76	0.00
24	When concentrating on using the Facebook group page to disseminate PGrip with patients, I can focus my attention so that I become unaware of what's going on around me	3.16	0.76	0.08	0.89	–0.12	0.28	0.44	0.13	0.98	–0.09	0.35	0.25
Environmental context and resources
25	Within the socio-political context (clinical unit) there is sufficient financial support (e.g. from local authorities, insurance companies) for using the Facebook group page to disseminate PGrip with patients	2.91	0.81	–0.21	1.02	–0.44	0.02	0.08	0.03	0.86	–0.17	0.22	0.79
26	Within the socio-political context (clinical unit) there are good networks between parties involved in using the Facebook group page to disseminate PGrip with patients	2.84	0.76	0.04	0.98	–0.18	0.26	0.73	0.12	0.90	–0.09	0.32	0.26
Social influences
27	Most people who are important to me think that I should use the Facebook group page to disseminate PGrip with patients	2.62	0.91	0.03	0.85	–0.17	0.22	0.79	0.01	0.82	–0.18	0.20	0.89
28	Most people whose opinion I value would approve me of using the Facebook group page to disseminate PGrip with patients	3.17	0.89	0.12	0.96	–0.10	0.33	0.29	0.09	1.00	–0.14	0.32	0.43

CI: confidence interval; PGrip: People Getting a Grip on Arthritis; SD: standard deviation.

^aOne participant did not complete the TDF questionnaire. Additionally one participant provided no responses for question #27 (n = 76).

Scores based on 1 = strongly disagree, 5 = strongly agree; missing values were imputed using last observation carried forward method.