Table 3.

Number of tweets remaining after automatic classification.

Cities	Stress rank 2011 (2014)a	No. of tweets	No. of tweets containing “relax”	No. of tweets containing “stress”	No. of relaxation tweets	No. of stress tweets	No. of relaxation tweets (first-hand)	No. of stress tweets (first-hand)
Los Angeles	1 (3)	6,627,969	5061	7925	3216	5914	2788	2386
New York	2 (1)	8,229,442	6992	11,789	4412	8245	3766	3278
San Diego	5 (38)	2,908,774	2178	3769	1449	2830	1275	1193
San Francisco	7 (39)	4,372,966	2554	4558	1682	3384	1471	1389

^aStress ranking is based on 2011 Forbes [40] and 2014 CNN studies [41]. Statistical tests between cities showed there are differences between cities (P<.001), except San Diego and New York (stress: P=.18, relaxation: P=.02). P values of relaxation and stress tweets between San Diego and Los Angeles are .41 and <.001, respectively. Ranks based on stress tweets are New York=San Diego, Los Angeles, and San Francisco.