Table 3 Spearman’s rank correlation between the efficiency scores and different studies’ characteristics
SSpearman’s rho | Technical efficiency | Number of hospitals | Income categories | Orientation of the model |
|---|---|---|---|---|
Technical efficiency | ||||
 Correlation coefficient | 1.000 | − 0.519** | 0.201 | 0.279 |
 Sig. (2-tailed) | – | 0.008 | 0.336 | 0.262 |
 N | 25 | 25 | 25 | 25 |
Number of hospitals | ||||
 Correlation coefficient | − 0.519** | 1.000 | − 0.201 | − 0.076 |
 Sig. (2-tailed) | 0.008 | – | 0.336 | 0.765 |
 N | 25 | 25 | 25 | 25 |
Income categories | ||||
 Correlation coefficient | 0.201 | − 0.201 | 1.000 | 0.818** |
 Sig. (2-tailed) | 0.336 | 0.336 | – | 0.000 |
 N | 25 | 25 | 25 | 25 |
Orientation of the model | ||||
 Correlation coefficient | 0.279 | − 0.076 | 0.818** | 1.000 |
 Sig. (2-tailed) | 0.262 | 0.765 | 0.000 | – |
 N | 25 | 25 | 25 | 25 |