| Cohort Enrollees (Year 1) | Completed One or More Surveillance Reports | Among Surveillance Participants, Percentage (95% CI) of Weeks with Completed Reports a | ||
---|---|---|---|---|---|
N (Col. %) | N (Row %) | p-value b | Â | p-value c | |
Total N | 1374 (100) | 1106 (80) |  | 55 (53–56) |  |
Medical Record Variables | |||||
 Study Site |  |  | p < .0005 |  | p < .0005 |
  Site 1 | 565 (41) | 503 (89) |  | 63 (61–65) |  |
  Site 2 | 809 (59) | 603 (75) |  | 47 (46–49) |  |
 Race (White) |  |  | p < .0005 |  | p < .0005 |
  White | 934 (68) | 785 (84) |  | 57 (56–59) |  |
  Non-White | 440 (32) | 321 (73) |  | 48 (45–50) |  |
 Ethnicity |  |  | p < .0005 |  | p < .0005 |
  Hispanic/Latina | 173 (13) | 122 (71) |  | 48 (44–52) |  |
  Non-Hispanic | 1201 (87) | 984 (82) |  | 55 (54–57) |  |
 High Risk Medical Conditions | |||||
  Chronic Condition (prior to pregnancy) | 277 (20) | 228 (82) | p = .39 | 57 (54–60) | p = .08 |
   No condition | 1097 (80) | 878 (80) |  | 54 (52–56) |  |
  Pregnancy Complication | 1034 (75) | 830 (80) | p = .72 | 54 (53–56) | p = .50 |
   No complication | 340 (25) | 276 (81) |  | 55 (53–58) |  |
 Medical visits for ARI (1 or more) | |||||
  Year Prior to Study (12 months) | 320 (23) | 255 (80) | p = .68 | 55 (53–56) | p = .69 |
   No visit | 1054 (77) | 851 (81) |  | 55 (53–56) |  |
  Study Period (6 months) | 307 (22) | 234 (76) | p = .03 | 55 (53–56) | p = .76 |
   No visit | 1067 (78) | 872 (82) |  | 55 (53–56) |  |
 Study Season’s Influenza Vaccine (received) | 1038 (76) | 847 (82) | p = .07 | 55 (52–58) | p = .88 |
  Not received | 336 (24) | 259 (77) |  | 55 (53–56) |  |
Interview variables, N (Col. %) | |||||
 Woman’s Age (at start of season), Years d |  |  | p = .04 |  | p = .04 |
   < 25 | 112 (8) | 93 (83) |  | 49 (44–54) |  |
  25–29 | 317 (23) | 261 (82) |  | 55 (52–58) |  |
  30–34 | 558 (41) | 459 (82) |  | 56 (54–58) |  |
   ≥ 35 | 387 (28) | 293 (76) |  | 54 (51–56) |  |
 Gestational Age (at start of season), Days d |  |  | p < .0005 |  | p < .0005 |
   < 137 | 339 (25) | 306 (90) |  | 65 (53–67) |  |
  137–172 | 363 (26) | 283 (78) |  | 56 (54–59) |  |
  173–224 | 356 (26) | 301 (85) |  | 53 (51–55) |  |
   ≥ 225 | 316 (23) | 216 (68) |  | 40 (37–43) |  |
 Race (Self-Reported) |  |  | p < .0005 |  | p < .0005 |
  White | 934 (68) | 785 (84) |  | 57 (56–59) |  |
  Asian | 205 (15) | 154 (75) |  | 52 (48–55) |  |
  Black | 64 (5) | 40 (63) |  | 44 (37–51) |  |
  Mixed or Other | 171 (12) | 127 (74) |  | 44 (40–48) |  |
 Marital Status |  |  | p = .61 |  | p = .003 |
  Married or Partnered | 1286 (94) | 1037 (81) |  | 55 (54–57) |  |
  Not Married and Not Partnered | 88 (6) | 69 (78) |  | 47 (41–52) |  |
 Education |  |  | p = .14 |  | p = .08 |
  High school or less | 119 (9) | 92 (77) |  | 50 (42–54) |  |
  Some college or bachelor’s degree | 744 (54) | 589 (79) |  | 55 (53–57) |  |
  Advanced degree | 511 (37) | 425 (83) |  | 55 (53–57) |  |
 Subjective social status |  |  | p = .23 |  | p = .77 |
  1 to 3 (low) | 25 (2) | 20 (80) |  | 51 (41–61) |  |
  4 to 6 (medium) | 697 (51) | 555 (80) |  | 55 (53–57) |  |
  7 to 9 (high) | 632 (46) | 518 (82) |  | 54 (52–56) |  |
  Missing or refused | 20 (1) | 13 (65) |  | 57 (43–71) |  |
 Child(ren) aged < 13 years at home |  |  | p < .0005 |  | p = .001 |
  No | 644 (47) | 549 (85) |  | 57 (55–59) |  |
  Yes child | 730 (53) | 557 (76) |  | 52 (51–54) |  |
 Self-rated Health Status |  |  | p = .11 |  | p = .24 |
  Poor, fair, or good | 301 (22) | 234 (78) |  | 52 (49–55) |  |
  Very good | 548 (40) | 435 (79) |  | 55 (53–57) |  |
  Excellent | 525 (38) | 437 (83) |  | 55 (53–54) |  |
 Smoking |  |  | p = .34 |  | p = .68 |
  Never smoked | 1016 (74) | 824 (81) |  | 55 (53–56) |  |
  Previously or currently smoke | 358 (26) | 282 (79) |  | 54 (51–57) |  |
 Stressful events in past year (number) |  |  | p = .11 |  | p = .001 |
  0 | 276 (20) | 231 (84) |  | 55 (54–58) |  |
  1 | 349 (25) | 290 (83) |  | 56 (54–59) |  |
  2 | 310 (23) | 243 (78) |  | 57 (55–60) |  |
  3 or more | 439 (32) | 342 (78) |  | 51 (48–53) |  |