Table 2.

Demographic characteristics of infants participated in RNA-sequencing study.

Clinical variable	Mild disease (n = 5)	Severe disease (n = 5)	P value*
Gestational age, wk; mean ± SE	39.20 ± 0.66	37.80 ± 0.80	0.22
Birth weight, kg; mean ± SE	3.33 ± 0.11	3.42 ± 0.13	0.60
Gender, male; no. (%)	2 (40)	2 (40)	0.81
Race; no. (%)
Caucasian only	3 (60)	4 (80)
African American only	2 (40)	1 (20)	1.00
Other	0 (0)	0 (0)
Age, mo.; mean ± SE	3.34 ± 1.16	3.18 ± 1.44	0.93
Days of illness; mean ± SE
Exposure to tobacco smoke; no. (%)	3 (60)	2 (40)	0.36
RSV group A, B; no. each group	2, 3	4, 1	0.52

^*P-values calculated by t-test for all except for male, race, smoking and RSV strain fisher’s exact test was used.