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. 2021 Dec 17;8(1):16–26. doi: 10.1177/23800844211063870

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© International Association for Dental Research and American Association for Dental, Oral, and Craniofacial Research 2021

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — CONSORT diagram demonstrating patient flow over course of study. Diagram demonstrates overall dropout from the study at each time point and also indicates the number of people included in this analysis (i.e., people returning both Graded Chronic Pain Scale and Use of Services and Productivity Questionnaire).

^aThere was no significant difference in age, sex, or origin of pain between positively screened patients who participated and those who declined (P > 0.05).

^bThere were no significant differences in sex, ethnicity, duration of pain, or origin of pain between those dropping out and the 198 participants whose data were included in the study (P > 0.05). However, those participating were significantly older than those who dropped out (P < 0.01).

^cOne patient withdrew from the study at M18 and requested that their data be withdrawn.

^dData were not received from 3 participants at M0 who reported returning data, but this was not received by the study team. These patients returned data at subsequent time points.

^eThere was no significant difference between those dropping out at M6 and the M0 sample on the basis of age, sex, ethnicity, duration of pain, or origin of pain (P > 0.05).

^fThere was no significant difference between those dropping out at M12 and the M0 sample on the basis of age, sex, ethnicity, or origin of pain (P > 0.05), although those dropping out had a significantly longer duration of pain than those participating at baseline (P < 0.05).

^gOne of these patients went on to complete data at a further time point.

^hThere was no significant difference between those dropping out at M18 and the M0 sample on the basis of age, sex, duration of pain, or origin of pain (P > 0.05), although those dropping out consisted of a greater proportion of a White British ethnic group than those participating at baseline (P < 0.01).

ⁱThere was no significant difference between those dropping out at M24 and the M0 sample on the basis of age, sex, duration of pain, or origin of pain (P > 0.05), although those dropping out consisted of a greater proportion of a White British ethnic group than those participating at baseline (P < 0.01).