Table 1 Cases of different age groups in the control group and observation group (n)
Grouping | 1–6 Mth | 7–12 Mth | 13-18Mth | 19–24 Mth | 2Year | 3–4 Year | 5–6 Year | 7–8 Year | Total |
|---|---|---|---|---|---|---|---|---|---|
Control group | 18 | 11 | 10 | 7 | 10 | 14 | 16 | 15 | 101 |
Observation group | 4 | 15 | 10 | 10 | 10 | 15 | 6 | 3 | 73 |