Case study on neural networks:

You all know that in this era of technology some technologies like Data Science, Machine learning ,Deep Learning,etc are emerging as advancement in the industry.

So neural networks is the part of these technologies.

A case study of using artificial neural networks for classifying cause of death from verbal autopsy:

In many countries routine vital statistics are of poor quality, and often incomplete or unavailable. In countries where vital registration and routine health information systems are weak, the application of verbal autopsy (VA) in demographic surveillance systems or cross-sectional surveys has been suggested for assessing cause-specific burden of mortality. The technique involves taking an interviewer-led account of the symptoms and signs that were present preceding the death of individuals from their caretakers. Traditionally the information obtained from caretakers is analysed by physicians and a cause(s) of death is reached if a majority of physicians on a panel agreed on a cause(s)

Background

Artificial neural networks (ANN) are gaining prominence as a method of classification in a wide range of disciplines. In this study ANN is applied to data from a verbal autopsy study as a means of classifying cause of death.

Methods

A simulated ANN was trained on a subset of verbal autopsy data, and the performance was tested on the remaining data. The performance of the ANN models were compared to two other classification methods (physician review and logistic regression) which have been tested on the same verbal autopsy data.

Results

Artificial neural network models were as accurate as or better than the other techniques in estimating the cause-specific mortality fraction (CSMF). They estimated the CSMF within 10% of true value in 8 out of 16 causes of death. Their sensitivity and specificity compared favourably with that of data-derived algorithms based on logistic regression models.

Conclusions

Cross-validation is crucial in preventing the over-fitting of the ANN models to the training data. Artificial neural network models are a potentially useful technique for classifying causes of death from verbal autopsies. Large training data sets are needed to improve the performance of data-derived algorithms, in particular ANN models.

KEY MESSAGES:

• Artifical neural networks have potential for classifying causes of death from verbal autopsies.
• Large datasets are needed to train neural networks and for validating their performance.
• Generalizability of neural network models to various settings needs further evaluation.