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. 2021 Apr 7;22:11. doi: 10.1186/s40510-021-00355-7

Table 4.

Chi-square test and regression analysis for question related to the orthodontic treatment, and gender, age, and PHQ-4 (sample 486)

Gender Age PHQ-4
Χ2 OR (95% CI) Χ2 OR (95% CI) Χ2 OR (95% CI)
Back to the dental practice to continue the orthodontic treatment after lockdown 0.132 0.059 0.576
Think that attending the orthodontic practice may increase the risk of infection 0.475 0.059 0.004 1.83 (1.21-2.75)
Consider that not having had orthodontic check-ups during lockdown created discomfort 0.761 0.096 0.011 1.69 (1.12-2.54)

Χ2 P value of the chi-squared test, OR odds ratio of the logistic regression model, 95% CI 95% confidence interval of the odds ratio