Table 3. Tests for preferred and avoided associations.
| Period | Parameter | Real | Random | P |
| SD: Standard deviation. CV: Coefficient of variation. P: P-value. | ||||
| 2007–2010 | Mean association index | 0.20988 | 0.20985 | |
| SD | 0.24414 | 0.24334 | 0.0094 | |
| CV | 1.16326 | 1.15960 | 0.0124 | |
| Proportion non-zero elements | 0.60860 | 0.60716 | 0.8370 | |
| Mean non-zero elements | 0.34485 | 0.34562 | 0.8667 | |
| SD non-zero elements | 0.22667 | 0.22491 | 0.0002 | |
| CV non-zero elements | 0.65729 | 0.65075 | 0.0004 | |
| 2017–2019 | Mean association index | 0.11766 | 0.11747 | |
| SD | 0.16880 | 0.16517 | 0.0010 | |
| CV | 1.43462 | 1.40602 | 0.0000 | |
| Proportion non-zero elements | 0.47297 | 0.47747 | 0.0240 | |
| Mean non-zero elements | 0.24877 | 0.24604 | 0.0110 | |
| SD non-zero elements | 0.16621 | 0.15969 | 0.0010 | |
| CV non-zero elements | 0.66812 | 0.64905 | 0.0030 | |