JPH JMIR Public Health Surveill JMIR Public Health and Surveillance 2369-2960 JMIR Publications Toronto, Canada v8i5e39498 35576576 10.2196/39498 Corrigenda and Addenda Corrigenda and Addenda Correction: The Transition of Social Isolation and Related Psychological Factors in 2 Mild Lockdown Periods During the COVID-19 Pandemic in Japan: Longitudinal Survey Study Sugaya Nagisa PhD 1 https://orcid.org/0000-0002-4803-3907 Yamamoto Tetsuya PhD 2
Graduate School of Technology, Industrial and Social Sciences Tokushima University 1-1, Minamijosanjima-cho Tokushima, 770-8502 Japan 81 88 656 7617 t.yamamoto@tokushima-u.ac.jp
https://orcid.org/0000-0003-4241-532X Suzuki Naho BA 3 https://orcid.org/0000-0002-5191-8669 Uchiumi Chigusa PhD 2 https://orcid.org/0000-0002-0854-8842 Unit of Public Health and Preventive Medicine School of Medicine Yokohama City University Yokohama Japan Graduate School of Technology, Industrial and Social Sciences Tokushima University Tokushima Japan Graduate School of Sciences and Technology for Innovation Tokushima University Tokushima Japan Corresponding Author: Tetsuya Yamamoto t.yamamoto@tokushima-u.ac.jp 5 2022 16 5 2022 8 5 e39498 11 5 2022 12 5 2022 ©Nagisa Sugaya, Tetsuya Yamamoto, Naho Suzuki, Chigusa Uchiumi. Originally published in JMIR Public Health and Surveillance (https://publichealth.jmir.org), 16.05.2022. 2022

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 https://publichealth.jmir.org/2022/3/e32694

In “The Transition of Social Isolation and Related Psychological Factors in 2 Mild Lockdown Periods During the COVID-19 Pandemic in Japan: Longitudinal Survey Study” (JMIR Public Health Surveill 2022;8(3):e32694) the authors noted one error.

In Table 2 of the originally published article, the standard deviations of the PHQ-9 in phases 1 and 2 in the 'Persistent-SI' group were missed. The table was originally published as shown in Multimedia Appendix 1.

The 2 SD values were 5.93 and 6.07, respectively, and the corrected Table 2 is as follows:

Differences and interactions between phasesa and transition of SIb on different scales.

Phase Mean score (SD) Effect of phase Effect of group Interaction
No SI Improved SI Worsened SI Persistent SI F (df) Pvalue ηG2c F (df) Pvalue ηG2 F (df) Pvalue ηG2
LSNS-6d
1 16.84 (3.71) 7.89 (2.77) 14.58 (2.73) 5.50 (3.31) 15.18 (1, 7889) <.001 0.000 8071.80 (3, 7889) <.001 0.640 2046.36 (3, 7889) <.001 0.066
2 16.46 (3.55) 14.56 (2.83) 7.81 (2.93) 5.21 (3.28) N/Ae N/A N/A N/A N/A N/A N/A N/A N/A
UCLA-LS3f
1 19.56 (4.67) 23.07 (4.61) 22.26 (4.55) 26.41 (5.20) 10.51 (1, 7889) .001 0.000 1096.28 (3, 7889) <.001 0.259 38.59 (3, 7889) <.001 0.002
2 19.87 (4.86) 22.13 (4.76) 23.38 (4.59) 26.62 (5.33) N/A N/A N/A N/A N/A N/A N/A N/A N/A
K6g
1 3.99 (4.38) 5.23 (5.37) 4.96 (4.88) 6.12 (5.77) 536.70 (1, 7889) <.001 0.013 103.10 (3, 7889) <.001 0.030 2.64 (3, 7889) .048 0.000
2 2.63 (4.01) 3.37 (4.87) 3.68 (4.82) 4.71 (5.63) N/A N/A N/A N/A N/A N/A N/A N/A N/A
PHQ-9h
1 3.05 (4.06) 4.41 (5.39) 4.19 (5.05) 5.53 (5.93) 168.90 (1, 7889) <.001 0.004 126.46 (3, 7889) <.001 0.038 2.32 (3, 7889) .073 0.000
2 2.4 (3.89) 3.27 (5.19) 3.49 (4.88) 4.77 (6.07) N/A N/A N/A N/A N/A N/A N/A N/A N/A

aPhase 1: between May 11 and 12, 2020, in the final phase of the first state of emergency; phase 2: between February 24 and 28, 2021, in the final phase of the second state of emergency.

bSI: social isolation.

cηG2: 0.010, small; 0.060, medium; 0.140, large.

dLSNS-6: Lubben Social Network Scale (shortened version).

eN/A: not applicable.

fUCLA-LS3: University of California, Los Angeles (UCLA) Loneliness Scale, Version 3.

gK6: Kessler Psychological Distress Scale-6.

hPHQ-9: Patient Health Questionnaire-9.

The correction will appear in the online version of the paper on the JMIR Publications website on May 16, 2022, together with the publication of this correction notice. Because this was made after submission to PubMed, PubMed Central, and other full-text repositories, the corrected article has also been resubmitted to those repositories.

Original published version of “Table 2. Differences and interactions between phasesa and transition of SIb on different scales.”