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. 2010 Mar 3;5(3):e9498. doi: 10.1371/journal.pone.0009498

Table 3. Effect of season on the associations between high seasonality and objective health risk factors.

Health measurement Seasonality group Season Statistics for seasonality group*season
Winter Spring Summer Fall Anova F(6) P
Men
Systolic blood pressure (mm Hg) GSS<8 132 (13) 131 (14) 130 (13) 131 (15) 2.60 .016
GSS 8–10 133 (13) 130 (13) 129 (14) 132 (13)
GSS≥11 134 (15) 131 (12) 123 (20) 129 (17)
Women
BMI GSS<8 24.6 (4.0) 24.6 (4.1) 24.2 (3.7) 24.3 (3.8) 2.34 .030
GSS 8–10 24.4 (3.8) 24.7 (3.8) 25.0 (4.1) 24.8 (4.1)
GSS≥11 25.5 (4.5) 25.3 (4.2) 24.8 (3.8) 25.6 (4.4)
Systolic blood pressure (mm Hg) GSS<8 124 (14) 123 (14) 122 (15) 123 (14) 2.21 .039
GSS 8–10 123 (13) 123 (13) 123 (14) 123 (14)
GSS≥11 123 (12) 124 (15) 119 (12) 123 (13)

Analysis of variance using objective health measurements as dependent variables and seasonality group, season and the interaction term seasonality group*season as independent variables. Only significant effects are shown.

GSS = Global Seasonality Score.