Table 3 Stages, methods and their description of the study

Pre-selection

1. Spearman’s correlation

2. Chi-squared test of independence

3. Linear regression of continuous variables

4. Multiple logistic regression

Network Analysis

1. Link weight in bipartite network

i. Logistic regression

2. 1. 1. One-mode projection: country network

i. Normalization

ii. Matrix multiplication

iii. Community detection: Louvain method

3. 1. 1. One-mode projection: variable network

i. Normalization

ii. Matrix multiplication

iii. Community detection: Blockmodeling