| Characteristic . | IIV (n = 1026) . | Placebo (n = 1023) . |
|---|---|---|
| Girls, No. (%)a | 484 (47.2) | 484 (47.3) |
| Births <37 wk gestational age, No. (%) | 108 (10.5) | 96 (9.4) |
| Mean birth weight, kg (SD)b | 3.0 (0.5) | 3.1 (0.5) |
| Birth weight <2500 g, No. (%)b | 133 (13.0) | 122 (12.0) |
| Mean days between maternal vaccination and birth (SD) | 81.5 (35.3) | 80.6 (35.4) |
| Median days of follow-up (IQR) | 172 (168–175) | 172 (168–175) |
| Deaths, No. (%) | 15 (1.5) | 21 (2.1) |
| Characteristic . | IIV (n = 1026) . | Placebo (n = 1023) . |
|---|---|---|
| Girls, No. (%)a | 484 (47.2) | 484 (47.3) |
| Births <37 wk gestational age, No. (%) | 108 (10.5) | 96 (9.4) |
| Mean birth weight, kg (SD)b | 3.0 (0.5) | 3.1 (0.5) |
| Birth weight <2500 g, No. (%)b | 133 (13.0) | 122 (12.0) |
| Mean days between maternal vaccination and birth (SD) | 81.5 (35.3) | 80.6 (35.4) |
| Median days of follow-up (IQR) | 172 (168–175) | 172 (168–175) |
| Deaths, No. (%) | 15 (1.5) | 21 (2.1) |
Abbreviations: IIV, inactivated influenza vaccine; IQR, interquartile range; SD, standard deviation.
aInformation on sex missing in 1 infant in the IIV group.
bBirth weight information missing in 2 infants in the IIV group and 2 infants in the placebo group.
| Characteristic . | IIV (n = 1026) . | Placebo (n = 1023) . |
|---|---|---|
| Girls, No. (%)a | 484 (47.2) | 484 (47.3) |
| Births <37 wk gestational age, No. (%) | 108 (10.5) | 96 (9.4) |
| Mean birth weight, kg (SD)b | 3.0 (0.5) | 3.1 (0.5) |
| Birth weight <2500 g, No. (%)b | 133 (13.0) | 122 (12.0) |
| Mean days between maternal vaccination and birth (SD) | 81.5 (35.3) | 80.6 (35.4) |
| Median days of follow-up (IQR) | 172 (168–175) | 172 (168–175) |
| Deaths, No. (%) | 15 (1.5) | 21 (2.1) |
| Characteristic . | IIV (n = 1026) . | Placebo (n = 1023) . |
|---|---|---|
| Girls, No. (%)a | 484 (47.2) | 484 (47.3) |
| Births <37 wk gestational age, No. (%) | 108 (10.5) | 96 (9.4) |
| Mean birth weight, kg (SD)b | 3.0 (0.5) | 3.1 (0.5) |
| Birth weight <2500 g, No. (%)b | 133 (13.0) | 122 (12.0) |
| Mean days between maternal vaccination and birth (SD) | 81.5 (35.3) | 80.6 (35.4) |
| Median days of follow-up (IQR) | 172 (168–175) | 172 (168–175) |
| Deaths, No. (%) | 15 (1.5) | 21 (2.1) |
Abbreviations: IIV, inactivated influenza vaccine; IQR, interquartile range; SD, standard deviation.
aInformation on sex missing in 1 infant in the IIV group.
bBirth weight information missing in 2 infants in the IIV group and 2 infants in the placebo group.
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