Table 4.
Effect of age on the principal components’ definition.
| Principal Component | Age Range * | n | Mean Rank | Kruskal–Wallis H | p-Value |
|---|---|---|---|---|---|
| PC1-Responsive to quality attributes | 18–25 a | 68 | 216.11 | 20.346 | 0.000 |
| 26–35 a,b | 146 | 254.96 | |||
| 36–45 b | 99 | 268.96 | |||
| 46–55 c | 133 | 311.65 | |||
| 56–65 b,c | 73 | 293.41 | |||
| >65 a,b,c | 24 | 261.73 | |||
| Total | 543 | ||||
| PC2-Local is better | 18–25 a | 68 | 329.14 | 34.411 | 0.006 |
| 26–35 a | 146 | 297.90 | |||
| 36–45 a | 99 | 293.27 | |||
| 46–55 b | 133 | 236.03 | |||
| 56–65 b | 73 | 234.05 | |||
| >65 b | 24 | 179.56 | |||
| Total | 543 | ||||
| PC3-Local is sustainable | 18–25 a | 68 | 233.98 | 14.318 | 0.003 |
| 26–35 a,b | 146 | 247.12 | |||
| 36–45 c | 99 | 290.54 | |||
| 46–55 b,c | 133 | 282.76 | |||
| 56–65 c | 73 | 311.55 | |||
| >65 a,c | 24 | 274.69 | |||
| Total | 543 | ||||
| PC4-Availability request | 18–25 a | 68 | 326.40 | 16.663 | 0.007 |
| 26–35 b | 146 | 280.72 | |||
| 36–45 a,b | 99 | 279.06 | |||
| 46–55 b,c | 133 | 258.21 | |||
| 56–65 c | 73 | 225.14 | |||
| >65 a,b,c | 24 | 254.60 | |||
| Total | 543 |
* For each component, age groups with the same superscript letter (a,b,c) are not significantly different (α = 0.05, Mann–Whitney test, pairwise comparison).