Table 1.

Comparison of different data collection techniques.

Sl. no.	Authors and publication years	Parameters	Data collection technique	Advantages	Disadvantages
1	Tekieh et al. [50], 2015	Accuracy	Electronic health record	Different techniques with their merits are described. Hence, based on the requirement of research, an optimal approach can be considered	No suggestion about any new technique
2	Shahin et al. [51], 2014	Error rate, accuracy	Electronic health record	Case study provided in this research for practical application	Applicable for specific environment
3	Yang et al. [52], 2016	Accuracy	Rule-based approach	Data gathering speed is improved through the proposed mechanism	Further work can be done to improve accuracy.
4	Mdaghri et al. [53], 2016	Accuracy	Support system for clinical decision	Accurate data collection	Improper handling of missing values
5	Roy et al. [54], 2016	Correlation, accuracy	Correlation-based ratio analysis	Healthcare-related specific information is gathered because of correlation	Have not considered missing values.
6	Rao et al. [34], 2016	Prediction, accuracy	Open dataset	Better visualization because of GUI	Missing values not considered