Table 8.
Comparison of 4-month-old infant development according to household lifestyle
| Development item (KIDS) | Current employment status | p value | Household income | p value | Satisfaction with current lifestyle | p value | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Not employed (homemakers and women on maternity leave) (n = 272) | Employed (currently working) (n = 13) | <2 million yen (n = 12) | Over 2 million yen, <6 million yen (n = 220) | 6 million yen or more (n = 44) | Satisfied (n = 205) | Neither (n = 54) | Dissatisfied (n = 21) | ||||
| Motor score | 10.0 [2–13] | 10.0 [5–12] | 0.989 | 10.5 [5–12] | 10.0 [2–13] | 10.0 [7–13] | 0.488 | 10.0 [2–13] | 9.0 [4–13] | 10.0 [4–13] | 0.145 |
| Motor skills | 11.0 [5–14] | 11.0 [6–13] | 0.402 | 10.0 [6–13] | 11.0 [5–14] | 11.0 [6–14] | 0.851 | 11.0 [3–14] | 11.0 [6–14] | 10.0 [8–14] | 0.862 |
| Language comprehension | 7.0 [1–8] | 6.0 [3–8] | 0.908 | 6.5 [3–8] | 7.0 [1–8] | 7.0 [3–8] | 0.119 | 7.0 [1–8] | 6.0 [3–8] | 6.0 [5–8] | 0.886 |
| Verbalization | 6.0 [2–8] | 7.0 [3–8] | 0.022 | 6.5 [3–8] | 6.0 [2–8] | 6.0 [3–8] | 0.808 | 6.0 [2–8] | 6.0 [3–8] | 6.0 [2–8] | 0.468 |
| Sociability with adults | 13.0 [6–19] | 13.0 [6–19] | 0.676 | 13.0 [6–15] | 13.0 [6–19] | 12.0 [6–19] | 0.188 | 13.0 [6–19] | 13.0 [8–18] | 12.0 [8–18] | 0.823 |
| Diet | 4.0 [0–7] | 4.0 [3–7] | 0.169 | 4.0 [2–6] | 4.0 [0–7] | 4.0 [2–7] | 0.745 | 4.0 [1–7] | 4.0 [1–7] | 4.0 [0–7] | 0.956 |
Data are presented as the median with the range in square brackets