Table 2.
Cases | No. (%) with 2 doses |
No. (%) with 0 doses |
Controls | No. (%) with 2 doses |
No. (%) with 0 doses |
VE of 2 doses vs 0 doses1 | 95% CI | ||
---|---|---|---|---|---|---|---|---|---|
All cases: age ≥6 months1 | 92 | 76 (83) | 16 (17) | 452 | 400 (88) | 52 (12) | 51 | 2–75 | |
Age 6 through 11 months | 37 | 30 (81) | 7 (19) | 259 | 227 (88) | 32 (12) | 52 | −40–84 | |
Age ≥12 months2 | 55 | 46 (84) | 8 (16) | 193 | 173 (90) | 20 (10) | 60 | −9–85 | |
Higher severity cases3: age ≥6 months | |||||||||
Cases with IVF | 84 | 68 (81) | 16 (19) | 452 | 400 (88) | 52 (12) | 55 | 10–78 | |
Cases hospitalized for ≥5 days | 62 | 50 (81) | 12 (19) | 452 | 400 (88) | 52 (12) | 57 | 2–81 | |
Cases with score ≥9 | 46 | 38 (83) | 8 (17) | 452 | 400 (88) | 52 (12) | 52 | −19–81 | |
Cases with score ≥10 | 28 | 23 (82) | 5 (18) | 452 | 400 (88) | 52 (12) | 60 | −19–86 | |
Cases with score ≥11 | 23 | 18 (78) | 5 (22) | 452 | 400 (88) | 52 (12) | 67 | 0–89 |
IVF, intravenous fluids.1Models included rotavirus vaccine status (2 doses, 1 dose or 0 doses), birth month, birth year, admission quarter, admission year.
2Oldest case was aged 31 months, and oldest control was aged 30 months.
3Severity score calculated based on Supplemental Table 1. The scored categories included the top 58%, 35% and 29% of the cases, respectively. The models for scored categories controlled for the birth quarter instead of birth month, to reduce degrees of freedom given lower case counts.