Combined model fitted to daily number of trauma admissions.

<p>Daily number of trauma admissions at OUH Ullevål 2001–2010. Combined Fourier and daylight and weather model with cyclic weekly pattern.</p

Seasonal component.

<p>Estimated seasonal component by trigonometric functions for daily trauma admission across the 10 years 2001–2010.</p

Weekly pattern.

<p>Estimated weekly pattern in daily trauma admission across all 572 weeks in the 10 year sample 2001–2010 for the three models displayed in Figs <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0192568#pone.0192568.g002" target="_blank">2B, 2D</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0192568#pone.0192568.g005" target="_blank">5</a>.</p

Model fits to daily number of trauma admissions.

<p>Daily number of trauma admissions at OUH Ullevål 2001–2010 (grey) with fit from various statistical models superimposed (black). Seasonal models using Fourier series (left column) or daily daylight and weather variables (right column), without an additional week effect (top row) or with an additional week effect added (bottom row).</p

Correlation between predictors.

<p>Correlation between predictors.</p

Daily number of trauma admissions.

<p>Daily number of trauma admissions at OUH Ullevål 2001–2010. Long-term trend from Generalized Additive Model superimposed. A day is defined as the 24-h time interval starting at 06:00 local time on a given date.</p

Poisson regression results.

<p>Poisson regression results.</p