Univariate correlation analysis among FLI and explanatory variables.

<p>Univariate correlation analysis among FLI and explanatory variables.</p

Prevalence of detectable BAT in men and women.

<p>The bars show the percentage of ¹⁸F-FDG males and females positive BAT in a total population of 6454 patients (3293 women and 3161 men). ★, p<0.001.</p

Monthly ¹⁸F-FDG BAT.

<p>Prevalence (•) of the monthly ¹⁸F-FDG BAT for the period January 2007–June 2010 and corresponding minimum outdoor temperature (▴) and day length (♦).</p

Univariate and multivariate analyses of factors associated with positive ¹⁸F-FDG BAT.

<p>Univariate and multivariate analyses of factors associated with positive ¹⁸F-FDG BAT.</p

Mass, activity and number of BAT positive depots in men and women and effect of age on the occurrence of BAT.

<p>Panel A shows the mass of BAT in grams. Panel B shows the activity of BAT in grams times the mean SUV value in grams per milliliter. Panel C shows the number of BAT positive depots. The box plots indicate the lower quartile (lower line), median quartile (middle line), upper quartile (upper line), 1.5 times the interquartile range (lower and upper whiskers), and outliers (circles). Patients were divided into decades. The mean ± S.D. of activity (D), mass (E) and number of BAT positive depots (F) in each decade is shown.</p

Seasonal variation in the occurrence of BAT.

<p>Panel A shows the percentage of BAT positive patients referred to the total population scanned in the indicated period. Panel B shows the activity of BAT in grams times the mean SUV value in grams per milliliter of the positive patients referred to the period indicated. Panel C shows the number of BAT positive depots referred to the period indicated. Significant effect of period assessed by either Wilcoxon-Mann-Whitney <i>U</i> test (★ p<0.01) or X² test (★★ p<0.001).</p

Clinical and physical characteristics of BAT-positive and date matched BAT-negative control patients.

<p>Data are expressed as mean ± standard deviation (SD). Statistical differences between groups were analyzed by Student’s t-test.</p

Average monthly mean values of ¹⁸F-FDG BAT.

<p>Prevalence (•) for the period January 2007-June 2010 and corresponding average minimum outdoor temperature (▴) and day length (♦).</p

Characteristics of 99 patients showing positive ¹⁸F-FDG BAT uptake at first scan and their characteristics at first subsequent negative scan; day length and temperatures the day of the scan and 24 h and 48 h before.

<p>Data are expressed as mean ± standard deviation (SD). N.S., not significant. Statistical differences between groups were analyzed by Student’s t-test.</p

Percentage of patients with metabolic syndrome (MetS) according to sleep disordered breathing.

<p>Percentage of patients with metabolic syndrome (MetS) according to sleep disordered breathing.</p