Incidence and survival of stomach cancer in a high-risk population of Chile

AIM:To study the incidence and survival rate of stomach cancer(SC)and its associated factors in a high risk population in Chile. METHODS:The population-based cancer registry of Valdivia,included in the International Agency for Research on Cancer system,covers 356 396 residents of Valdivia Province,Southern Chile.We studied all SC cases entered in this Registry during 1998-2002 (529 cases).Population data came from the Chilean census(2002).Standardized incidence rates per 100 000 inhabitants(SIR)using the world population, cumulative risk of developing cancer before age 75, and rate ratios by sex,age,ethnicity and social factors were estimated.Relative survival(EdererⅡmethod) and age-standardized estimates(Brenner method) were calculated.Specific survival rates(Kaplan-Meier) were measured at 3 and 5 years and survival curves were analyzed with the Logrank and Breslow tests. Survival was studied in relation to demographics, clinical presentation,laboratory results and medical management of the cases.Those variables significantly associated with survival were later included in a Cox multivariate model. RESULTS:Between 1998 and 2002,529 primary gastric cancers occurred in Valdivia(crude incidence rate 29.2 per 100000 inhabitants).Most cases were male(69.0%), residents of urban areas(57.5%)and Hispanic(83.2%), with a low education level(84.5%<8 school years). SC SIR was higher in men than women(40.8 and 14.8 respectively,P<0.001),risk factors were low education RR 4.4(95%CI:2.9-6.8)and 1.6,(95%CI:1.1-2.1) for women and men respectively and Mapuche ethnicity only significant for women(RR 2.2,95%CI:1.2-3.7).Of all cases,76.4%were histologically confirmed,11.5% had a death certificate only(DCO),56.1%were TNM stageⅣ;445 cases(84.1%)were eligible for survival analysis,all completed five years follow-up;42 remained alive,392 died of SC and 11 died from other causes. Specific 5-year survival,excluding cases with DCO,was 10.6%(95%CI:7.7-13.5);5-year relative survival rate was 12.3%(95%CI:9.1-16.1),men 10.9%(95%CI: 7.4-15.2)and women 16.1%(95%CI:9.5-24.5).Fiveyear specific survival was higher for patients aged<55 years(17.3%),with intestinal type of cancer(14.6%), without metastasis(22.2%),tumor size<4 cm(60.0%), without lymphatic invasion(77.1%),only involvement of the mucous membrane(100%).Statistically significant independent prognostic factors were:TNM staging, diffuse type,metastasis,supraclavicular adenopathy, palpable tumor,and hepatitis or ascites. CONCLUSION:Social determinants are the main risk factors for SC,but not for survival.An advanced clinical stage at consultation is the main cause of poor SC survival.

Profile of abortion in Chile, with extremely restrictive law

Chile, together with El Salvador, Malta and Nicaragua has the most restrictive abortion laws. In these countries there is very little information on pregnancies that end in abortions. An analysis is made of official information regarding hospital discharges for abortion in Chile between 2001 and 2010, classified according to age and according to the WHO ICD 10. The Chilean Ministry of Health’s Statistics Office (DEIS) collected the data. In 334,485 hospital discharges for abortion, Ectopic Abortion (O00), the Hydatidiform Mole (O01) and Other Abnormal Products of Conception (O02) corresponded to 37.2% of hospital discharges. Spontaneous Abortion (O03) reached 15% and Non Specified Abortion (O06) reached 35.5% and most probably included complications of induced abortions. 77% of hospital discharges corresponded to women between 20 and 34 years of age. Adolescents correspond to 11% of hospital discharges. In the annual average of 33,500 hospital discharges, Other Abnormal Products of Conception (O02), Other Abortions (O05), and Non Specified Abortions (O05) contribute to 72.7% of hospital discharges. This is explained by incomplete diagnoses, by means of the omission of induced abortion as this would mean jail for the woman and legal red-tape for the health personnel involved. Maternal mortality has not fallen. Abortion Mortality and Fatality rates do not change. There is a discrepancy between the law and hospital discharge diagnoses for abortion. The antiabortion law remains unheeded and obeys an ideological bias that brings damage and abuse to Chilean women. The aim of this study is to gain better information from a country that does not allow abortion under any circumstance, and its usefulness to countries in similar situations, together with its negative consequences on woman’s health and rights.