Table 1.

Baseline Characteristics of the Modified Intention-to-treat Population

Characteristic	Total	Oseltamivir	Placebo
	(N =; 556)	(n =; 277)	(n =; 279)
Age, y
Median (quartiles)	36 (27, 47)	37 (27, 49)	35 (27, 46)
Min, Max	18, 64	18, 64	18, 63
Sex
Female	347 (62%)	183 (66%)	164 (59%)
Race
Asian	385 (69%)	193 (70%)	192 (69%)
White	150 (27%)	74 (27%)	76 (27%)
Black or African American	18 (3%)	7 (3%)	11 (4%)
Race not available	3 (1%)	3 (1%)	0
Ethnicity
Hispanic or Latino	24 (4%)	11 (4%)	13 (5%)
Country
Thailand	366 (66%)	182 (66%)	184 (66%)
United States	178 (32%)	91 (33%)	87 (31%)
Argentina	12 (2%)	4 (1%)	8 (3%)
Influenza type (site testing)
A	387 (70%)	187 (68%)	200 (72%)
B	164 (29%)	88 (32%)	76 (27%)
Coinfection with more than 1 virus	5 (1%)	2 (1%)	3 (1%)
Influenza type (central laboratory)
Influenza A/H3N2	251 (45%)	122 (44%)	129 (47%)
Influenza A/H1N1	93 (17%)	39 (14%)	54 (19%)
Influenza B	156 (28%)	85 (31%)	71 (26%)
Negative	52 (9%)	30 (11%)	22 (8%)
Coinfectiona	1 (<0.5%)	0 (0%)	1 (<0.5%)
No. missing	3	1	2
Hours from onset of influenza-like illness to screening
Median (quartiles)	28 (21, 39)	29 (22, 40)	27 (20, 37)
Min, Max	0, 49	1, 49	0, 49
Hours from screening to randomization
Median (quartiles)	0 (0, 0)	0 (0, 0)	0 (0, 0)
Min, Max	0, 23	0, 23	0, 10
Hours from randomization to treatment initiation
Median (quartiles)	1 (0, 5)	1 (0, 5)	1 (0, 5)
Min, Max	0, 21	0, 20	0, 21
Smoking (at any point)?
Yes	68 (12%)	35 (13%)	33 (12%)
Influenza vaccination in the season of enrollment?
Yes	57 (10%)	34 (12%)	23 (8%)

^aCoinfection: quantitative polymerase chain reaction (qPCR) results are for flu A/H3 as flu B was not detected by qPCR.