Correction to: Headache frequency and neck pain are associated with trapezius muscle T2 in tension-type headache among young adults (The Journal of Headache and Pain, (2023), 24, 1, (84), 10.1186/s10194-023-01626-w)

Correction: J Headache Pain 24, 84 (2023). Following publication of this article, the authors identified some errors in the text and Table 2 that resulted in an incorrect representation of the data and may eventually lead to misinterpretations of parts of the findings of this article. The respective correction of those issues does not change the main direction or conclusions of the article. The corrected text, along with the affected rows and columns of Table 2 are highlighted below with bold font and the original article has been updated. The authors would like to apologize for any inconvenience caused to the readers. Section Page Incorrect Correct Abstract (Results) 1 The TTH + group demonstrated the highest muscle T2 values (right side: 31.4 ± 1.2 ms, left side: 31.4 ± 0.8 ms) as compared to the TTH- group or HC group (p < 0.001). The TTH + group demonstrated the highest muscle T2 values (right side: 31.4 ± 1.2 ms, left side: 31.4 ± 0.8 ms) as compared to the TTH- group or HC group (p = 0.011). Statistical analysis 4 Statistical analysis was performed using STATA (version 16; StataCorp LP, College Station, TX, USA) and Prism (version 6; GraphPad Prism, San Diego, CA, USA). Statistical analysis was performed using STATA (version 16; StataCorp LP, College Station, TX, USA), Excel (2019 MSO, version 2410; Microsoft Corp., Redmond, WA, USA), and Prism (version 6; GraphPad Prism, San Diego, CA, USA). T2 values of the trapezius muscles 5 The HC group demonstrated the lowest T2 values (right side: 30.0 ± 1.1 ms, left side: 30.2 ± 1.1 ms), followed by the TTH- group (right side: 30.8 ± 1.1 ms, left side: 30.9 ± 1.1 ms) and the TTH + group (right side: 31.4 ± 1.2 ms, left side: 31.4 ± 0.8 ms). The HC group demonstrated the lowest T2 values (right side: 30.0 ± 1.1 ms, left side: 30.2 ± 1.1 ms), followed by the TTH- group (right side: 30.8 ± 1.1 ms, left side: 31.1 ± 1.2 ms) and the TTH + group (right side: 31.4 ± 1.2 ms, left side: 31.4 ± 0.8 ms). T2 values of the trapezius muscles 5 However, statistically significant associations for the average T2 value (mean of left- and right-sided trapezius muscles) and group assignments were observed (HC vs. TTH-: p < 0.001; HC vs. TTH+: p < 0.001; TTH- vs. TTH+: p < 0.001). However, statistically significant associations for the average T2 value (mean of left- and right-sided trapezius muscles) and group assignments were observed (HC vs. TTH-: p = 0.048; HC vs. TTH+: p = 0.011; TTH- vs. TTH+: p = 0.239; delta method: HC / TTH- / TTH+: p < 0.001). Group differentiation based on T2 values 6 With average T2 as the predictor, the AUC for differentiating between the HC and TTH- groups was 0.68 (OR: 2.03, 95%-CI: 1.01–4.11, p = 0.04), and it was 0.82 for the differentiation between the HC and TTH + groups (OR: 3.80, 95%-CI: 1.36–10.61, p = 0.01). Furthermore, the AUC for differentiating between the TTH- and TTH + groups was 0.69 (OR: 1.61, 95%-CI: 0.73–3.53, p = 0.24). With average T2 as the predictor, the AUC for differentiating between the HC and TTH- groups was 0.68 (OR: 2.03, 95%-CI: 1.01–4.11, p = 0.04), and it was 0.82 for the differentiation between the HC and TTH + groups (OR: 3.80, 95%-CI: 1.36–10.61, p = 0.01). Furthermore, the AUC for differentiating between the TTH- and TTH + groups was 0.69 (OR: 1.61, 95%-CI: 0.73–3.53, p = 0.24). Participant characteristics HC (n = 22) vs. TTH- (n = 16) p-value vs. TTH+ (n = 12) p-value BMI (kg/m²) mean ± SD, range 22.0 ± 2.3 19.1–28.7 22.1 ± 2.4 18.8–28.1 21.7 ± 1.7 18.9–24.7 0.689 No. of mTrPs mean ± SD, range 4.0 ± 4.0 0–10 3.8 ± 2.8 0–10 0.898 3.8 ± 2.0 1–8 0.906 Headache (days/month) Mean ± SD, range 2.0 ± 1.5 0–5 (n = 21) 10.1 ± 7.6 3–30 < 0.001 10.3 ± 6.8 4–25 Neck pain no. subjects 0 (0%) 10 (63%) < 0.001 10 (83%) < 0.001