Table 4.
Characteristics of all enrollees in year one and year two who completed 6-month post-delivery follow-up interviews
| 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) | |
Abbreviations: NA Not applicable, ARI Acute respiratory illness
aAll enrollees includes cohort enrollees (year 1), medical enrollees (years 1 and 2), and ARI-negative enrollees (year 2)
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