1. Das Ranjan
2. Das PN

9789350250174

10.5005/jp/books/11438_13

1/e

2011

9

1. Lady Hardinge Medical College and Associated Hospitals, New Delhi, India
2. Delhi Institute of Rural Development, New Delhi, India

Sources of error in studies, Selection bias, Prevalence-incidence bias, Berkesonian bias, Non-response bias, Dissimilar group bias, Measurement bias, Surveillance/diagnostic bias, Recall bias, Hawthorne effect, Confounding, Post-hoc bias, Methods for minimizing bias, Randomization, Restriction, Matching, Stratification, Statistical techniques.