Table 1.
Demographic Characteristics of the Study Groups Stratified by Shigella Culture Results.
| Variable | Shigella-positive stool cultures n = 5,269 (10.13%) |
Shigella-negative stool cultures n = 46,726 (89.87%) |
p-value | |
|---|---|---|---|---|
| Mean age at stool culture examination, (years, CI) | 2.50 (2.49–2.51) | 2.59 (2.56–2.61) | .644 | |
| Age categories at stool culture examination n (%) | 0–3 months | 1,059 (20.1) | 8,993 (19.4) | .579 |
| >3-12 months | 1,190 (22.7) | 10,293 (23.1) | .416 | |
| 1–2 years | 2,075 (39.3) | 21,137 (45.3) | .115 | |
| >2–3 years | 945 (17.9) | 5,673 (12.2) | .01 | |
| Mean age at censoring (years, CI) | 12.2 (6.7–17.6) | 11.8 (6.5–17.9) | .584 | |
| Gender n (%) | Male n (%) | 2,887 (54.8) | 25,857 (55.3) | .935 |
| Female n (%) | 2,382 (45.2) | 20,869 (44.7) | ||
| Socio-economic status (SES) | Low | 2,173( 41.2) | 20,226(43.3) | .505 |
| Middle | 2,115 (40.1) | 18,553(39.7) | ||
| High | 424 (8.2) | 3,628 (7.7) | ||
| Missing | 557 (10.5) | 4,319 (9.3) | ||
| Ethnic group | Secular Jewish | 3,296 (62.6) | 27,226 (58.3) | .001 |
| Orthodox Jews | 1,523 (28.9) | 12,997 (27.8) | ||
| Israeli Arabs | 450 (8.5) | 6,503 (13.9) | ||
| No ADHD (n, %) | 4,033 (76.5) | 37,508 (80.3) | .001 | |
| Suspected ADHD cases (n, %) | 680 (12.9) | 5,173 (11.1) | .001 | |
| Confirmed ADHD cases (n, %) | 556 (10.6) | 4,045 (8.6) | .001 | |
| Born on August-September (n%) | 954 (18.1) | 8559 (18.3) | .427 | |