Table 1 Summary of population characteristics.
From: SARS pandemic exposure impaired early childhood development in China
|  | N (total = 14,647) | Statistics |
|---|---|---|
Subject N | Group: N (prevalence %) | |
Birth time | 14,647 | Before SARS: 4918 (33.6%); during SARS: 298 (2.0%); after SARS: 9431 (64.4%) |
Nationally | 14,386 | Han: 12,608 (87.6%); not Han: 1778 (12.4%) |
Gender | 14,645 | Female: 6976 (47.6%); male: 7669 (52.4%) |
Residence | 14,550 | Rural: 8853 (60.8%); urban: 5697 (39.2%) |
|  | Subject N | Mean (SD, 2.5–97.5% percentile) |
|---|---|---|
Age reaching a milestone (month) | ||
Walking independently | 11,216 | 14.3 (4.8, 9.0–25.0) |
Saying a complete sentence | 9496 | 20.6 (8.2, 10.0–37.0) |
Counting from 1 to 10 | 8296 | 34.7 (15.4, 12.0–72.0) |
Undressing him/herself for urination | 8687 | 32.5 (13.0, 12.0–60.0) |
Gestational length (month) | 13,621 | 9.3 (0.6, 8.0–10.0) |
Birthweight (kg) | 12,225 | 3.2 (0.6, 2.0–4.2) |
Breastfeeding duration (month) | 13,496 | 11.1 (7.4, 0.0–27.0) |
Birth year | 14,647 | 2006 (6.2, 1995–2016) |
|  | Subject N (longitudinal N) | Mean (SD, 2.5–97.5% percentile) |
|---|---|---|
Body weight (kg) | 14,489 (40,248) | 25.3 (13.9, 6.5–57.0) |
 Age for weight (year) | 7.4 (4.5, 0.2–15.2) | |
Body height (cm) | 14,489 (39,419) | 116.3 (32.2, 52.0–170.0) |
 Age for height (year) | 7.6 (4.5, 0.3–15.2) |
