Table 4.

Timing of tweets about tobacco relative to overall tweets among Twitter users with schizophrenia (n = 203).

Time interval	Proportion (n) of tweets about tobacco	Proportion (n) of overall tweetsa	χ2	P valueb
00:00–05:59	29.0% (218)	12.9% (77,070)	171.83	< 0.001
06:00–11:59	15.1% (114)	22.5% (134,502)	23.56	< 0.001
12:00–17:59	18.7% (141)	32.5% (193,829)	64.83	< 0.001
18:00–23:59	37.2% (280)	26.6% (191,511)	8.98	0.003
Total tweetsc	100.0% (753)	100.0% (596,912)

^aReflects the total number of tweets among Twitter users who self-identify as having schizophrenia including tweets about tobacco at each time interval.

^bP-values calculated using Chi-square tests.

^cReflects the total number of tweets about tobacco and overall within the schizophrenia user group with available time data.