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Table 3 Association of period of COVID-19 outbreak with physical activity levels and rest-activity circadian rhythm parameters

From: Changes in physical activity and rest-activity circadian rhythm among Hong Kong community aged population before and during COVID-19

  Physical activity Rest-activity circadian rhythm b
MET/minutes MESOR Amplitude Acrophase Percent rhythm
Period of COVID-19 Low N = 132 N(%) High N = 110 N(%) Crude OR (CI) Adjusted OR (CI) a Low N = 109 N(%) High N = 108 N(%) Crude OR (CI) Adjusted OR (CI) a Low N = 109 N(%) High N = 108 N(%) Crude OR (CI) Adjusted OR (CI) a Advanced N = 109 N(%) Delayed N = 108 N(%) Crude OR (CI) Adjusted OR (CI) a Low N = 109 N(%) Hig
N = 108 N(%)
Crude OR (CI) Adjusted OR (CI) a
Before outbreak 55 (41.7) 51 (46.4) 1.00 1.00 44 (40.4) 48 (44.4) 1.00 1.00 44 (40.4) 48 (44.4) 1.00 1.00 49 (45.0) 43 (39.8) 1.00 1.00 45 (41.3) 47 (43.5) 1.00 1.00
Between 2nd and 3rd waves of COVID-19 44 (33.3) 22 (20.0) 1.86 (0.98–3.51) 2.03 (1.05–3.93) 40 (36.7) 20 (18.5) 2.18 (1.11–4.29) 2.05 (1.01–4.18) 39 (35.8) 21 (19.4) 2.03 (1.04–3.96) 1.91 (0.95–3.83) 28 (25.7) 32 (29.6) 0.77 (0.40–1.47) 0.75 (0.38–1.49) 35 (32.1) 25 (23.1) 1.46 (0.76–2.82) 1.37 (0.70–2.67)
During 3rd wave of COVID-19 33 (25.0) 37 (33.6) 0.83 (0.45–1.51) 0.83 (0.44–1.56) 25 (22.9) 40 (37.0) 0.68 (0.36–1.30) 0.72 (0.36–1.43) 26 (23.9) 39 (36.1) 0.73 (0.38–1.38) 0.80 (0.41–1.58) 32 (29.4) 33 (30.6) 0.85 (0.45–1.61) 0.82 (0.42–1.61) 29 (26.6) 36 (33.3) 0.84 (0.45–1.59) 0.83 (0.43–1.60)
  1. Abbreviations: OR odds ratio, CI confidence intervals, 1st first, 2nd second, 3rd third, MESOR Midline statistic of rhythm
  2. a Adjusted for the age at interview, sex, education attainment, employment status, and BMI. b All rest-activity rhythms parameters were stratified based on their median distribution