Skip to main content

Table 4 Characteristics of all enrollees in year one and year two who completed 6-month post-delivery follow-up interviews

From: Factors associated with recruitment, surveillance participation, and retention in an observational study of pregnant women and influenza

 

All Enrollees a

N (Col. %)

Completed 6-Month Follow-up Interview

N (Row %)

Total N

1726 (100)

1595 (92)

 

Medical Record Variables

 Study Site

  

p < .0005

  Site 1

651 (38)

625 (96)

 

  Site 2

1075 (62)

970 (90)

 

 Race (White)

  

p = .047

  White

1100 (64)

1027 (93)

 

  Non-White

626 (36)

568 (91)

 

 Ethnicity

  

p = .007

  Hispanic/Latina

277 (16)

245 (88)

 

  Non-Hispanic

1449 (84)

1350 (93)

 

 High Risk Medical Conditions

  Chronic Condition (prior to pregnancy)

347 (20)

326 (94)

p = .23

   No condition

1379 (80)

1269 (92)

 

  Pregnancy Complication

1327 (77)

1226 (92)

p = .95

   No complication

399 (23)

369 (92)

 

 Medical visits for ARI (1 or more)

  Year Prior to Study (12 months)

358 (21)

324 (91)

p = .13

   No visit

1368 (79)

1271 (93)

 

  Study Period (6 months)

393 (23)

352 (90)

p = .02

   No visit

1333 (77)

1243 (93)

 

 Study Season’s Influenza Vaccine (received)

1235 (72)

1152 (93)

p = .03

  Not received

491 (28)

443 (90)

 

Interview variables, N (Col. %)

 Woman’s Age (at start of season), Years b

  

p < .0005

   < 25

176 (10)

140 (80)

 

  25–29

412 (24)

382 (93)

 

  30–34

677 (39)

642 (95)

 

   ≥ 35

461 (27)

431 (93)

 

 Gestational Age (at start of season), Days b

  

p = .58

   < 137

447 (26)

410 (92)

 

  137–172

437 (25)

406 (93)

 

  173–224

437 (25)

409 (94)

 

   ≥ 225

405 (23)

370 (91)

 

 Race (Self-Reported)

  

p = .035

  White

1100 (64)

1027 (93)

 

  Asian

248 (14)

231 (93)

 

  Black

88 (5)

76 (86)

 

  Mixed or Other

290 (17)

261 (90)

 

 Marital Status

  

p < .0005

  Married or Partnered

1603 (93)

1496 (93)

 

  Not Married and Not Partnered

123 (7)

99 (80)

 

 Education

  

p < .0005

  High school or less

178 (10)

151 (85)

 

  Some college or bachelors degree

955 (55)

879 (92)

 

  Advanced degree

593 (34)

565 (95)

 

 Subjective social status

  

p < .0005

  1 to 3 (low)

43 (2)

33 (77)

 

  4 to 6 (medium)

896 (52)

837 (93)

 

  7 to 9 (high)

763 (44)

705 (92)

 

  Missing or refused

24 (1)

20 (83)

 

 Child(ren) aged < 13 years at home

  

p = .02

  No

786 (46)

739 (94)

 

  Yes child

940 (54)

856 (91)

 

 Self-rated Health Status

  

p = .002

  Poor, fair, or good

416 (24)

372 (89)

 

  Very good

693 (40)

658 (95)

 

  Excellent

617 (36)

565 (92)

 

 Smoking

  

p = .005

  Never smoked

1272 (74)

1189 (93)

 

  Previously or currently smoke

454 (26)

406 (89)

 

 Stressful events in past year (number)

  

p = .81

  0

325 (19)

300 (92)

 

  1

438 (25)

409 (93)

 

  2

369 (21)

338 (92)

 

  3 or more

594 (34)

548 (92)

 
  1. Abbreviations: NA Not applicable, ARI Acute respiratory illness
  2. aAll enrollees includes cohort enrollees (year 1), medical enrollees (years 1 and 2), and ARI-negative enrollees (year 2)
  3. bWomen’s age and age of fetus were calculated using a common reference date, which was the start of the influenza season at each study site