病棟のチョコ、生存期間は51分
Christmas 2013: Research
The survival time of chocolates on hospital wards: covert observational study
BMJ 2013; 347 doi: http://dx.doi.org/10.1136/bmj.f7198 (Published 14 December 2013)
Cite this as: BMJ 2013;347:f7198
http://www.bmj.com/content/347/bmj.f7198
Results
191 out of 258 (74%) chocolates were observed being eaten. The mean total observation period was 254 minutes (95% confidence interval 179 to 329). The median survival time of a chocolate was 51 minutes (39 to 63). The model of chocolate consumption was non-linear, with an initial rapid rate of consumption that slowed with time. An exponential decay model best fitted these findings (model R2=0.844, P<0.001), with a survival half life (time taken for 50% of the chocolates to be eaten) of 99 minutes. The mean time taken to open a box of chocolates from first appearance on the ward was 12 minutes (95% confidence interval 0 to 24). Quality Street chocolates survived longer than Roses chocolates (hazard ratio for survival of Roses v Quality Street 0.70, 95% confidence interval 0.53 to 0.93, P=0.014). The highest percentages of chocolates were consumed by healthcare assistants (28%) and nurses (28%), followed by doctors (15%).
Conclusions
From our observational study, chocolate survival in a hospital ward was relatively short, and was modelled well by an exponential decay model. Roses chocolates were preferentially consumed to Quality Street chocolates in a ward setting. Chocolates were consumed primarily by healthcare assistants and nurses, followed by doctors. Further practical studies are needed.
英国で4病棟を対象に、病棟でのチョコレート消費量を観察研究で調査。病棟に設置した258個中191個（74％）が消費された。チョコレートの生存期間中央値は51分で、指数関数的に減衰した。製品別ではQuality StreetよりもRosesが好まれる傾向が見られ、看護助手と看護師による消費率が最も高かった（共に28％）。
真面目な学会誌でとても真面目な論文、、、素晴らしいｗ。
ちなみに、留花の病院の看護師さんの控室（休憩室？なんて呼ぶんだろうｗ）には、お菓子がワンサカ置いてあります。
結構減るのは早いです。
もちろん、留花も仕事の終わり頃には結構それを頂きます。
チョコは、、、一袋位なら、確かに帰るまでにはなくなりますが。
51分ですかぁ。。。
早いなｗ。
クリスマス記念ネタ論文なのか、、、本気の投稿なのか
すんませんが、そこまでは深く読んでいませんがｗ。
素晴らしい論文ですねぇ。
留花も
詰め所で休憩中に寝ている看護師さんの睡眠時間とか年齢層とか調査してみましょうか。。。
