ABSTRACT
Background: Cancer registries are valuable resources for cancer control and research. To justify their purpose, their data should be of satisfactory quality by being comparable internationally, complete in their coverage, valid in their values and timely in reporting. This study aimed to assess the quality of the Ratnagiri Population Based Cancer Registry's data for the years 2017-18 across the four dimensions of data quality. Methods: Regarding comparability, the registry procedure was reviewed vis-à-vis the rules they follow for cancer registry operation. We have used four methods for validity: re-abstraction and re-coding, diagnostic criteria methods- like the percentage of microscopically verified (MV%) and of death certificate only (DCO%) cases, missing information like proportion of cases of primary site unknown (PSU%) and internal validity. Semi-quantitative methods were employed for assessing completeness. Timeliness for all years of registry functioning was assessed qualitatively. Results: The overall accuracy rate of the registry was found to be 91.1% (94.7% for demographic and 88% for tumour details). Mortality to incidence ratios were found to be 0.50 for females and 0.59 for males. MV% was found to be 90.8% for males and 91.5% for females. The average number of sources per case was found to be 1.5. DCO% was found to be 2.7%. PSU% was 7.4%. Conclusion: We have positive results regarding the data's validity and comparability, but there is scope for improvement concerning completeness. Continuous training of the registry personnel and monitoring of the registry is recommended.
ABSTRACT
BACKGROUND: In the year 2010, it is estimated that nearly 0.36 million new cases and 0.19 million deaths with Non-Hodgkin lymphoma occurred. In India, among males, NHL incidence rates vary across the country which has encouraged us to conduct a case-control study to study risk factors. MATERIALS AND METHODS: The present unmatched hospital-based case-control study conducted at Tata Memorial Hospital included subjects registered between the years 1997-99. There were 390 'lymphoma cases' and 1,383 'normal controls. RESULTS: Data on age, tobacco habits, occupational history, dietary factors, tea, coffee were collected by the social investigators. Univariate and multivariate methods were applied for obtaining the odds ratios for risk factors. CONCLUSIONS: In the study, cigarette smoking (OR=2.0) and bidi smoking (OR=2.8), were associated with excess risk of lymphoma. Among the dietary items, only consumption of mutton showed 7.3-fold significant excess risk for lymphoma. Consumption of milk showed a 6-fold excess risk (OR=1.5); while coffee showed a 50% reduction in risk for lymphoma. Among occupational exposure, exposure to use of pesticides showed 3-fold excess risk for lymphoma.
Subject(s)
Lymphoma, Non-Hodgkin/epidemiology , Lymphoma, Non-Hodgkin/etiology , Alcohol Drinking/adverse effects , Animals , Case-Control Studies , Coffee , Feeding Behavior , Humans , India , Life Style , Male , Meat/adverse effects , Middle Aged , Milk/adverse effects , Occupational Exposure/statistics & numerical data , Pesticides/adverse effects , Risk Factors , Risk Reduction Behavior , Smoking/epidemiology , Surveys and Questionnaires , TeaABSTRACT
BACKGROUND: In India, prostate cancer is one of the five leading sites of cancers among males in all the registries. Very little is known about risk factors for prostate cancer among the Indian population. OBJECTIVES: The present study aims to study the association of lifestyle factors like chewing (betel leaf with or without tobacco, pan masala, gutka), smoking (bidi, cigarette), comorbid conditions, diet, body mass index (BMI), family history, vasectomy with prostate cancer. MATERIALS AND METHODS: This an unmatched hospital-based case-control study, comprised of 123 histologically proven prostate 'cancer cases' and 167 'normal controls. Univariate and regression analysis were applied for obtaining the odds ratio for risk factors. RESULTS: The study revealed that there was no significant excess risk for chewers, alcohol drinkers, tea and coffee drinkers, family history of cancer, diabetes, vasectomy and dietary factors. However, patients with BMI >25 (OR = 2.1), those with hypertension history (OR = 2.5) and age >55 years (OR = 19.3) had enhanced risk for prostate cancer. CONCLUSIONS: In the present study age, BMI and hypertension emerged as risk factors for prostate cancer. The findings of this study could be useful to conduct larger studies in a more detailed manner which in turn can be useful for public interest domain.
