Table 2 Characteristics of subjects with regard to pertussis vaccine up-to-date status (N = 373)
Pertussis Vaccine Up to date, Yes (n = 318) | Pertussis Vaccine Not up to date, No (n = 55) | P-values* | |
|---|---|---|---|
Age at case index date, years | 0.004 | ||
Median (IQR) | 13.3 (11.5–15.2) | 12.5 (7.5–14.2) | |
Mean (SD) | 12.7 (3.4) | 10.7 (4.9) | |
Sex, no. (%) | 0.78 | ||
Male | 174 (54.7) | 29 (52.7) | |
Female | 144 (45.3) | 26 (47.3) | |
Ethnicity, no. (%) | 0.47 | ||
Hispanic/Latino | 3 (0.9) | 0 (0) | |
American Indian/Alaska Native | 2 (0.) | 1 (1.8) | |
Asian | 2 (0.9) | 0 (0) | |
Native Hawaiian/Pacific Islander | 3 (0.6) | 1 (1.8) | |
White | 256 (80.5) | 37 (67.3) | |
Unknown | 52 (16.4) | 16 (29.1) | |
Ethnicity, no. (%) | 0.66 | ||
Nonwhites | 10 (3.1) | 2 (3.6) | |
Whites | 256 (80.5) | 37 (67.3) | |
Unknown | 52 (16.4) | 16 (29.1) | |
Maternal educational level, no. (%) | 0.38 | ||
High school or less | 22 (6.9) | 2 (3.6) | |
Some college | 40 (12.6) | 7 (12.7) | |
College graduate | 34 (10.7) | 2 (3.6) | |
Graduate degree or greater | 22 (6.9) | 1 (1.8) | |
Unknown | 200 (62.9) | 43 (78.2) | |
Paternal education level | 0.19 | ||
High school or less | 11 (3.5) | 3 (5.5) | |
Some college | 31 (9.8) | 2 (3.6) | |
College graduate | 18 (5.7) | 1 (1.8) | |
Graduate degree or greater | 31 (9.8) | 1 (1.8) | |
Unknown | 227 (71.4) | 48 (87.3) | |
HOUSES index in z-score | <0.001 | ||
Median (IQR) | −0.17 (−1.96, 2.51) | −0.93 (−4.05, 0.98) | |
Mean (SD) | 0.39 (3.59) | −1.23 (2.92) | |
HOUSES index in quartiles | 0.03 | ||
First (lowest SES) | 63/298 (21.1) | 17/49 (34.7) | |
Second | 74/298 (24.8) | 12/49 (24.5) | |
Third | 70/298 (23.5) | 14/49 (28.6) | |
Fourth (highest SES) | 91/298 (30.5) | 6/49 (12.2) | |
Smoking status, no. (%) | 0.51 | ||
Non-smoking | 99 (31.1) | 13 (23.6) | |
Smoking | 45 (14.2) | 4 (7.3) | |
Unknown | 174 (54.7) | 38 (69.1) | |
Asthma history | |||
Yes (before index date) | 114 (35.8) | 11 (20.0) | 0.021 |
No | 204 (64.2) | 44 (80.0) | |
Comorbid conditions at index date, no. (%)a | 0.63 | ||
Yes | 7 (2.2) | 2 (3.6) | |
No | 311 (97.8) | 53 (96.4) | |