. 2020 Jul 6;6(3):e17103. doi: 10.2196/17103

Table 6.

Differences in the absolute numbers and proportions of low birth weight and preterm births between mothers living in states in the highest tertile for negative racial sentiment and mothers living in states in the lowest tertile.

Year	Low birth weight, n/N (%)		Preterm, n/N (%)
	Total^a	Black^b	Total^a	Black^b
2015	11,712/3,444,706 (0.34)	3,039/469,659 (0.65)	14,261/3,444,783 (0.41)	3,466/470,019 (0.74)
2016	23,598/3,506,457 (0.67)	3,391/477,984 (0.71)	23,737/3,506,174 (0.68)	4,415/478,272 (0.92)
2017	10,490/3,040,622 (0.35)	8,711/479,384 (1.82)	16,827/3,037,346 (0.55)	7,060/465,674 (1.52)

^aFor the total sample, exposure is negative sentiment tweets referencing racial or ethnic minorities.

^bFor the sample of black mothers, exposure is negative sentiment tweets referencing black people.