Table 4. Incidence rates of first RV episodes in commercially insured and Medicaid populations, overall and stratified by age and pre/post-RV vaccine availability.
| Incidence rate per 10 000 person-years (95% CI) | ||
|---|---|---|
| Commercial | Medicaid | |
| Overall | 16.47 (16.18–16.77) | 34.02 (33.25–34.80) |
| Pre1 | 27.03 (26.42–27.65) | 37.71 (36.81–38.63) |
| Post1 | 10.14 (9.86–10.44) | 18.64 (17.37–19.99) |
| Age | ||
| <1 y | ||
| Pre1 | 43.32 (41.32–45.42) | 78.46 (75.54–81.49) |
| Post1 | 13.65 (12.81–14.55) | 29.29 (26.31–32.62) |
| 0 to <2 mo | ||
| Pre1 | 19.09 (16.25–22.43) | 41.62 (36.71–47.20) |
| Post1 | 12.74 (10.83–14.99) | 37.52 (29.26–48.13) |
| 2 to <4 mo | ||
| Pre1 | 23.74 (20.46–27.54) | 59.85 (53.89–66.47) |
| Post1 | 9.89 (8.24–11.86) | 23.96 (17.83–32.20) |
| 4 to <6 mo | ||
| Pre1 | 35.41 (31.27–40.10) | 74.90 (68.22–82.24) |
| Post1 | 10.90 (9.19–12.91) | 24.24 (18.32–32.07) |
| 6 to <12 mo | ||
| Pre1 | 65.33 (61.61–69.22) | 99.39 (94.68–104.32) |
| Post1 | 16.30 (15.0–17.73) | 30.39 (26.23–35.22) |
| 1 to <2 y | ||
| Pre1 | 50.53 (48.71–52.42) | 64.76 (62.14–67.48) |
| Post1 | 18.33 (17.49–19.22) | 29.86 (26.41–33.75) |
| 2 to <5 y | ||
| Pre1 | 10.91 (10.42–11.42) | 11.92 (11.26–12.61) |
| Post1 | 5.53 (5.26–5.81) | 7.97 (6.86–9.26) |
Notes:CI, confidence interval; RV, rotavirus. 1Pre- and post-RV vaccine availability periods were defined as the time through January 1, 2007 and the time after that date, respectively.