Table 1.
Demographic Characteristics of Cases and Controls, Multistate Investigation of Influenza-Associated Parotitis, United States, 1 October 2014–31 March 2015
| Characteristic | Cases (n = 50) | Controls (n = 124) | Odds Ratio [95% Confidence Interval]a | P Valuea | ||
|---|---|---|---|---|---|---|
| Respondents | n (%) | Respondents | n (%) | |||
| Age, years | 50 | 124 | ||||
| <2 | … | 0 (0) | … | 0 (0) | … | … |
| 2–4 | … | 2 (4) | … | 6 (5) | … | … |
| 5–13 | … | 21 (42) | … | 61 (49) | … | … |
| 14–19 | … | 13 (26) | … | 26 (21) | … | … |
| 20–49 | … | 11 (22) | … | 23 (19) | … | … |
| ≥50 | … | 3 (6) | … | 8 (6) | … | … |
| Sex | 50 | 124 | ||||
| Male | … | 38 (76) | … | 63 (51) | 3.0 [1.4, 6.3] | .005 |
| Female | … | 12 (24) | … | 61 (49) | Reference | … |
| Race | 50 | 124 | ||||
| Black | … | 3 (6) | … | 9 (7) | 1.3 [0.3, 4.9] | .74 |
| White | … | 42 (84) | … | 110 (89) | Reference | … |
| Other/unknown | … | 5 (10) | … | 5 (4) | 0.5 [0.1, 2.1] | .34 |
| Ethnicity | 50 | 124 | … | |||
| Hispanic | … | 7 (14) | … | 18 (15) | 1.3 [0.4, 3.8] | .66 |
| Non-Hispanic | … | 43 (86) | … | 106 (85) | Reference | … |
a
Odds ratios, 95% confidence intervals, and P values from conditional logistic regression. No statistical comparison of age group was done because age group was used to set up the matched case-control pairs.