A | B | A vs. B | C | A + B vs. C | D | A + B vs. D | |
---|---|---|---|---|---|---|---|
Medical Enrollees (Year 2) a | ARI-Negative Control Enrollees (Year 2) a | Medical vs. Control Enrollees | Reached for Recruitment but Refused to Participate | Medical and Control Enrollees vs. Refused | All Other Pregnant Women During Study (Year 2) b | Enrollees vs. All Other Pregnant Women | |
Total N | 151 | 103 | 514 | 19,264 | |||
Source: Medical Record, Categorical Variables, N (Col. %) | |||||||
Study Site | p < .0005 | p < .0005 | p < .0005 | ||||
Site 1 | 50 (33) | 20 (19) | 229 (45) | 3466 (18) | |||
Site 2 | 101 (67) | 83 (81) | 285 (55) | 15,798 (82) | |||
Race (White) | p = .01 | p = .01 | p < .0005 | ||||
White | 81 (54) | 39 (38) | 309 (60) | 11,213 (58) | |||
Non-White | 79 (52) | 64 (62) | 178 (35) | 7409 (38) | |||
Unknown Race | 27 (5) | 642 (3) | |||||
Ethnicity | p = .045 | NA c | NA c | ||||
Hispanic/Latina | 53 (35) | 24 (23) | 96 (19) | 3684 (19) | |||
Non-Hispanic | 98 (65) | 79 (77) | 147 (29) | 7206 (37) | |||
Unknown Ethnicity | 271 (53) | 8374 (43) | |||||
High Risk Medical Conditions | |||||||
Chronic Condition (prior to pregnancy) | 37 (25) | 12 (12) | p = .01 | 95 (18) | p = .27 | 2108 (11) | p = .03 |
Pregnancy Complication | 128 (85) | 76 (74) | p = .03 | 380 (74) | p = .47 | 11,816 (61) | p = .001 |
Medical visits for ARI (1 or more) | |||||||
Year Prior to Study (12 months) | 39 (26) | 24 (23) | p = .21 | 133 (26) | p = .67 | 2799 (15) | p < .0005 |
During Study Period (6 months) | NA | NA | NA | NA | |||
Study Season’s Influenza Vaccination | 79 (52) | 65 (63) | p = .09 | 130 (25) | p = .008 | 7432 (39) | p = .17 |
Medical Record, Continuous, Mean (95% CI) | |||||||
Woman’s Age (at start of season), Years d | |||||||
Site 1 | 28.5 (26.8–29.5) | 28.5 (26.8–29.5) | 30.0 (29.2–30.7) | 29.4 (29.1–20.5) | |||
Site 2 | 30.9 (230.1–31.7) | 30.9 (230.1–31.7) | 31.3 (30.7–32.0) | 31.4 (31.3–31.5) | |||
Gestational Age (at start of season), Days d | |||||||
Site 1 | 105 (79–130) | 105 (79–130) | 123 (108–137) | 146 (142–150) | |||
Site 2 | 97 (85–110) | 97 (85–110) | 91 (81–101) | 105 (104–107) |