Table 2
Cosinor analysis using mid-month data
Group
Sample size
Amplitude (%)
Acrophase
p Value
5–9 Male
798
21.5
16 December
0.002
5–9 Female
779
21.6
27 December
0.005
10–14 Male
1090
25.6
11 December
0.002
10–14 Female
1663
18.8
11 January
0.012