Table 2.
Univariate analysis of demographics of West Nile virus case-patients and control-subjects—East Valley of metropolitan Phoenix, Arizona, May 25–July 31, 2010
| Characteristics | Case-patients (N = 49) | Control-subjects (N = 74) | Univariate analysis | |||
|---|---|---|---|---|---|---|
| No. | (%) | No. | (%) | P value* | ||
| Sex | 0.08 | |||||
| Male | 27 | (55) | 29 | (39) | ||
| Female | 22 | (45) | 45 | (61) | ||
| Age group | 0.04† | |||||
| < 20 years | 3 | (6) | 3 | (4) | ||
| 20–39 years | 10 | (20) | 26 | (35) | ||
| 40–59 years | 21 | (43) | 34 | (46) | ||
| ≥ 60 years | 15 | (31) | 11 | (15) | ||
| Lives in Town of Gilbert | 0.02 | |||||
| Yes | 24 | (49) | 21 | (28) | ||
| No | 25 | (51) | 53 | (72) | ||
| Race | –‡ | |||||
| White | 35 | (71) | 60 | (81) | ||
| Other | 4 | (8) | 12 | (16) | ||
| Unknown | 10 | (20) | 2 | (3) | ||
| Ethnicity | – | |||||
| Non-Hispanic | 31 | (63) | 65 | (88) | ||
| Hispanic | 6 | (12) | 7 | (9) | ||
| Unknown | 12 | (24) | 2 | (3) | ||
| Education | – | |||||
| > High school | 29 | (59) | 56 | (76) | ||
| High school or less | 15 | (31) | 17 | (23) | ||
| Unknown | 5 | (10) | 1 | (1) | ||
| Household income | – | |||||
| < $50,000/year | 16 | (33) | 22 | (30) | ||
| ≥ $50,000/year | 24 | (49) | 38 | (51) | ||
| Unknown | 9 | (18) | 14 | (19) | ||
*
Persons with an “unknown” result excluded from univariate analysis.
†
Age ≥ 60 years compared with age < 60 years for univariate analysis.
‡
P value > 0.1.