Table 1.
Collected data attributes.
| Attribute | Definition |
| ISSN | International Standard Serial Number recorded |
| Title | Full title of the research |
| Journal | Publication venue record |
| Authors | All authors’ names |
| Publication date | The publication date of the paper |
| Publication type | The type of publication |
| Origin of publication | The geographical location of the first author’s institution |
| Targeted disorder | Investigated disorder |
| Database | Source of the data |
| Origin of data | The geographical location of data sources |
| Data characteristics | Type of voice recordings |
| Additional data | Used additional data except for voice recordings |
| Data sets | The number of participants |
| Sample size | The number of recordings |
| Aim of the study | Purpose of the study |
| Age range | The considered age range of the participants |
| Gender | The number of participants (by gender) |
| Quantitative result(s) | Presented outcome measures |
| Feature sets | Excluded features from voice |
| The proposed features | The best feature set, if exists |
| Applied MLa technique(s) | All applied ML techniques |
| Outcome evaluation | How the pathological voice is evaluated |
| Type of validation(s) | How the data set is divided |
| Type of study | If the study is longitudinal or cross-sectional |
| The proposed ML algorithm(s) | ML technique with the best outcome |
aML: machine learning.