Table 1.
Demographics of cases and controls
| Demographics | Cases % (N = 68) |
Neighbourhood controls % (N = 113) |
P-value | Cases % (N = 21) |
Pertussis cases (N = 36) |
P-value |
|---|---|---|---|---|---|---|
| Median age in years (range) | 8.0 (Range 0–83; Mean 18.3 (13.6–23.0) ± 19.36) | 57.5 (Range 0–84; Mean 51.0 (46.0–56.1) ± 20.8) | NRa | 7.0 (Range 1–70; Mean 19.4 (10.0–28.9) ± 20.8) | 8.0 (Range 1–65; Mean 16.3 (10.2–22.3) ± 17.9) | NR |
| 0–4 years | 36.8% (25) | 2.9% (2) | 0.001* | 28.6% (6) | 41.7% (15) | 0.242 |
| 5 years or older | 63.2% (43) | 97.1% (66) | 71.4% (15) | 58.3% (21) | ||
| Gender | ||||||
| Male | 58.8% (40) | 39.7% (27) | 0.027* | 47.6% (10) | 41.7% (15) | 0.662 |
| Female | 41.2% (28) | 60.3% (41) | 52.4% (11) | 58.3% (21) | ||
| Residence | ||||||
| Urban | 86.8% (59) | 86.8% (59) | 1.000 | 76.2% (16) | 75.0% (27) | 0.920 |
| Rural | 13.2% (9) | 13.2% (9) | 23.8% (5) | 25.0% (9) | ||
| Language spoken at home | ||||||
| English | 86.6% (58) | 100.0% (10) | NR | 76.2% (16) | 100.0% (4) | NR |
| Arabic | 3.0% (2) | 0.0% (0) | 0.0% (0) | 0.0% (0) | ||
| Hindi | 3.0% (2) | 0.0% (0) | 9.5% (2) | 0.0% (0) | ||
| Other languagesb | 7.4% (5) | 0.0% (0) | 14.3% (3) | 0.0% (0) | ||
| Aboriginality | ||||||
| Aboriginal but not Torres Strait Islander | 0.0% (0) | 1.5% (1) | NR | 0.0% (0) | 2.8% (1) | NR |
| Not Aboriginal and Torres Strait Islander | 98.5% (67) | 83.8% (57) | 95.2% (20) | 97.2% (35) | ||
| Both Aboriginal and Torres Strait Islander | 1.5% (1) | 0.0% (0) | 4.8% (1) | 0.0% (0) | ||
| Highest Level of Educationc | ||||||
| No formal education | 4.4% (3) | 2.9% (2) | NR | 4.8% (1) | 0.0% (0) | NR |
| Primary or elementary school (Year K-6 or equivalent) | 1.5% (1) | 4.4% (3) | 4.8% (1) | 2.8% (1) | ||
| Secondary school (Year 7–12 or equivalent) | 22.1% (15) | 22.1% (15) | 9.5% (2) | 41.7% (15) | ||
| Vocational (e.g. TAFE or skills training) | 27.9% (19) | 33.8% (23) | 28.6% (6) | 25.0% (9) | ||
| University | 36.8% (25) | 35.3% (24) | 42.9% (9) | 30.6% (11) | ||
| Other form of education | 7.3% (5) | 1.5% (1) | 9.5% (2) | 0.0% (0) |
a
NR not reported and/or calculated.
b
Other languages spoken by one person each: Bengali, Cantonese, Macedonian, Mandarin and Spanish.
c
If the case was under 12 years of age, the educational level was provided by the parent/head of household answering the survey.
*
Statistically significant (P < 0.05).