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P values of pairwise comparisons of the proportion of stress and relaxation tweets between the 4 studied cities.
| Cities | Los Angeles | New York | San Francisco | |
| San Diego | ||||
| Stress | <.001 | .18 | <.001 | |
| Relaxation | .41 | .02 | <.001 | |
| San Francisco | ||||
| Stress | <.001 | <.001 | N/Aa | |
| Relaxation | <.001 | <.001 | N/A | |
| New York | ||||
| Stress | <.001 | N/A | <.001 | |
| Relaxation | <.001 | N/A | <.001 | |
aN/A: not applicable.
