RSV

Influenza

Positive

n (%)

Negative

n (%)

OR (95%CI)

Positive

n (%)

Negative

n (%)

OR (95%CI)

Child Characteristics

Age

< 0.5

130 (30)

261 (19)

15.26 (8.61, 27.05)

17 (6)

374 (25)

0.09 (0.05, 0.15)

0.5-1

79 (18)

149 (11)

16.25 (8.93, 29.55)

21 (7)

207 (14)

0.20 (0.12, 0.32)

1-1.5

66 (15)

150 (11)

13.48 (7.36, 24.71)

14 (5)

202 (13)

0.14 (0.08, 0.24)

1.5-2

44 (10)

105 (8)

12.84 (6.78, 24.31)

19 (6)

130 (9)

0.30 (0.17, 0.38)

2-3

44 (10)

110 (8)

12.26 (6.48, 23.17)

28 (9)

126 (8)

0.43 (0.28, 0.68)

3-4

29 (7)

102 (7)

8.71 (4.44, 17.08)

23 (8)

108 (7)

0.42 (0.26, 0.68)

4-5

26 (6)

70 (5)

11.38 (5.67, 22.85)

24 (8)

72 (5)

0.65 (0.39, 1.08)

≥ 5

14 (3)

429 (31)

1.00

150 (51)

293 (19)

1.00

Age (years)^a

1.05 (0.42-2.06)

0.75 (0.71, 0.79)

5.15 (2.22-7.94)

1.20 (1.16, 1.24)

Sex

Male

242 (56)

728 (53)

1.00

160 (54)

810 (54)

1.00

Female

190 (44)

648 (47)

0.88 (0.71, 1.10)

136 (46)

702 (46)

0.98 (0.76, 1.26)

Birthweight (grams)

< 2,500

135 (31)

352 (26)

1.36 (1.07, 1.73)

54 (18)

433 (29)

0.56 (0.41, 0.77)

2,500-4,000 (typical)

264 (61)

934 (68)

1.00

219 (74)

979 (65)

1.00

≥ 4,000

33 (8)

90 (7)

1.30 (0.85, 1.98)

23 (8)

100 (7)

1.03 (0.64, 1.66)

Race

White

213 (49)

707 (51)

1.00

135 (46)

785 (52)

1.00

Black

156 (36)

496 (36)

1.04 (0.82, 1.32)

114 (39)

538 (36)

1.23 (0.94, 1.62)

Other

63 (15)

173 (13)

1.21 (0.87, 1.68)

47 (16)

189 (13)

1.45 (1.00, 2.09)

Ethnicity

Non-Hispanic

383 (89)

1213 (88)

1.00

253 (85)

1343 (89)

1.00

Hispanic

49 (11)

163 (12)

0.95 (0.68, 1.34)

43 (15)

169 (11)

1.35 (0.94, 1.94)

Insurance Type

Private

146 (33)

458 (33)

1.00

88 (30)

516 (34)

1.00

Public

267 (62)

839 (61)

1.00 (0.79, 1.26)

185 (63)

921 (61)

1.18 (0.89, 1.55)

Self-Pay

19 (4)

79 (6)

0.76 (0.44, 1.29)

23 (8)

75 (5)

1.80 (1.07, 3.02)

Respiratory Season

2012-2013

63 (15)

170 (12)

1.00

40 (14)

193 (13)

1.00

2013-2014

55 (13)

96 (7)

1.55 (1.00, 2.40)

14 (5)

137 (9)

0.49 (0.26, 0.94)

2014-2015

58 (13)

140 (10)

1.12 (0.73, 1.70)

36 (12)

162 (11)

1.07 (0.65, 1.76)

2015-2016

55 (13)

164 (12)

0.91 (0.59, 1.38)

26 (9)

193 (13)

0.65 (0.38, 1.11)

2016-2017

67 (16)

173 (13)

1.05 (0.70, 1.57)

39 (13)

201 (13)

0.94 (0.58, 1.52)

2017-2018

79 (18)

349 (25)

0.61 (0.42, 0.89)

42 (14)

386 (26)

0.53 (0.33, 0.84)

2018-2019

55 (13)

284 (21)

0.53 (0.35, 0.79)

99 (34)

240 (16)

1.99 (1.32, 3.01)

Maternal Characteristics

Age

< 20

30 (7)

100 (7)

0.93 (0.58, 1.48)

31 (10)

99 (7)

1.46 (0.90, 2.35)

20-24.9

98 (23)

303 (22)

1.00

71 (24)

330 (22)

1.00

25-29.9

103 (24)

337 (25)

0.95 (0.69, 1.30)

68 (23)

372 (25)

0.85 (0.59, 1.22)

30-34.5

122 (28)

384 (28)

0.98 (0.72, 1.33)

75 (25)

431 (29)

0.81 (0.57, 1.15)

≥ 35

79 (18)

252 (18)

0.97 (0.69, 1.36)

51 (17)

280 (19)

0.85 (0.57, 1.26)

Parity

0

155 (36)

568 (41)

1.00

117 (40)

606 (40)

1.00

1

137 (32)

414 (30)

1.21 (0.93, 1.58)

85 (29)

466 (31)

0.95 (0.70, 1.28)

≥ 2

140 (32)

394 (29)

1.32 (1.00, 1.69)

94 (32)

440 (29)

1.11 (0.82, 1.45)

Feeding Type at Delivery

Breastmilk Only

129 (30)

500 (36)

1.00

128 (43)

501 (33)

1.00

Formula and Breastmilk

87 (20)

269 (20)

1.25 (0.92, 1.71)

59 (20)

297 (20)

0.78 (0.55, 1.09)

Formula Only

164 (38)

498 (36)

1.28 (0.98, 1.66)

102 (34)

560 (37)

0.71 (0.54, 0.95)

Neither

52 (12)

109 (8)

1.85 (1.26, 2.71)

7 (2)

154 (10)

0.18 (0.08, 0.39)

Any Perinatal Smoking

No

353 (82)

1166 (85)

1.00

244 (82)

1275 (84)

1.00

Yes

79 (18)

210 (15)

1.24 (0.94, 1.65)

52 (18)

237 (16)

1.15 (0.82, 1.60)

Community-Level

High Proportion Unemployment

No

263 (61)

828 (60)

1.00

177 (60)

914 (60)

1.00

Yes

169 (39)

548 (40)

0.97 (0.78, 1.21)

119 (40)

598 (40)

1.03 (0.80, 1.33)

High proportion with less than bachelor’s degree

No

193 (45)

681 (49)

1.00

146 (49)

728 (48)

1.00

Yes

239 (55)

695 (51)

1.21 (0.98,1.51)

150 (51)

784 (52)

0.95 (0.74, 1.22)

High proportion living below poverty

No

279 (65)

883 (64)

1.00

191 (65)

971 (64)

1.00

Yes

153 (35)

493 (36)

0.98 (0.78, 1.23)

105 (35)

541 (36)

0.99 (0.76, 1.28)