TY - JOUR AU - Kumamaru, Hiraku AU - Tsugawa, Yusuke AU - Horiguchi, Hiromasa AU - Kumamaru, Kanako Kunishima AU - Hashimoto, Hideki AU - Yasunaga, Hideo PY - 2014 DA - 2014/07/12 TI - Association between hospital case volume and mortality in non-elderly pneumonia patients stratified by severity: a retrospective cohort study JO - BMC Health Services Research SP - 302 VL - 14 IS - 1 AB - The characteristics and aetiology of pneumonia in the non-elderly population is distinct from that in the elderly population. While a few studies have reported an inverse association between hospital case volume and clinical outcome in elderly pneumonia patients, the evidence is lacking in a younger population. In addition, the relationship between volume and outcome may be different in severe pneumonia cases than in mild cases. In this context, we tested two hypotheses: 1) non-elderly pneumonia patients treated at hospitals with larger case volume have better clinical outcome compared with those treated at lower case volume hospitals; 2) the volume-outcome relationship differs by the severity of the pneumonia. SN - 1472-6963 UR - https://doi.org/10.1186/1472-6963-14-302 DO - 10.1186/1472-6963-14-302 ID - Kumamaru2014 ER -