[The results of treatment of laryngeal cancer in 30-year material of General Hospital in Zielona Góra].
The authors present the material of 520 patients with cancer of the larynx operated during 1969-1998. Most of them (60%) have had III-th and IV-th degree advanced cancer. 399 (77%) patients have had the combined treatment--laryngectomy and X-ray or Co-therapy. The 5 years survival rate of 341 patients treated during 1969-93 is presented. 5-year cures after surgery occurred in 188 patients (55%).
Background ::: Following bacterial contamination of a municipal water system in the rural town of Walkerton, Ontario, over 2,300 cases of acute gastroenteritis were documented. The Walkerton Health Study is currently underway to assess for long-term health sequelae among consenting inhabitants of Walkerton, related to the original outbreak. We explored whether the association between the acute exposure and preliminary long-term health outcomes may have been biased through differences between early- and late-recruited study participants.