Table 6.
Multivariate associations between siblings’ status and cognitive level
| FSIQ score | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
|---|---|---|---|---|---|---|---|---|
| Characteristics | Have older brothers | Have older sisters | Have younger brothers | Have younger sisters | ||||
| 1. Female | 2.170* | 2.169* | 2.023* | 2.014* | 2.161* | 2.163* | 2.108* | 2.110* |
| −1.127 | −1.126 | −1.111 | −1.11 | −1.14 | −1.142 | −1.145 | −1.147 | |
| Characteristics (Only child. As Reference Group) | ||||||||
| 2. Characteristics 1(have older brothers/older sisters/younger brothers/younger sisters) | −1.167 | 1.724 | −0.591 | 1.354 | ||||
| −1.227 | −1.124 | −1.447 | −1.488 | |||||
| 3. Characteristics 2 (have older brothers/older sisters/younger brothers/younger sisters with 4 years) | 0.047 | 1.377 | −0.822 | 0.927 | ||||
| −1.796 | −1.576 | −1.775 | −1.995 | |||||
| 4. Characteristics 3 (have older brothers/older sisters/younger brothers/younger sisters over 4 years) | −1.546 | 2.061* | −0.295 | 1.72 | ||||
| −1.375 | −1.235 | −1.948 | −1.881 | |||||
| 5. Female* characteristics 1 | −0.919 | −3.493** | −2.191 | −2.923 | ||||
| −1.637 | −1.567 | −1.945 | −1.977 | |||||
| 6. Female* characteristics 2 | −4.814* | −5.297** | −1.997 | −2.732 | ||||
| −2.736 | −2.218 | −2.341 | −2.504 | |||||
| 7. Female* characteristics 3 | 0.137 | −2.629 | −2.45 | −2.942 | ||||
| −1.749 | −1.704 | −2.627 | −2.645 | |||||
| Constants | 90.541*** | 90.969*** | 96.133*** | 97.244*** | 96.349*** | 96.442*** | 93.754*** | 93.957*** |
| −6.886 | −6.92 | −6.205 | −6.241 | −7.844 | −7.88 | −7.773 | −7.809 | |
| Controls | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| N | 651 | 651 | 717 | 717 | 542 | 542 | 516 | 516 |
| R-sq | 0.155 | 0.159 | 0.166 | 0.171 | 0.169 | 0.169 | 0.152 | 0.152 |
All regressions control for village fixed effects. All regressions control for Age at time of surgery (month), Mother is primary caregiver, Premature birth, Age of mother, Mother completed high school, Primary caregiver completed high school, Family asset, and Project treatment. Columns (1) and (2) additionally control for having older sister, having a younger brother, and having younger sister. Columns (3) and (4) additionally control for having older brother, having younger brother, and having younger sister. Columns (5) and (6) additionally control for having older brother, having older sister and having younger sister. Columns (7) and (8) additionally control for having older brother, having older sister and having younger brother
Only children serve as the reference group
Column (1)(2) uses the sample of only children and children with older brothers, column (3)(4) uses the sample of only children and children with older sisters, column (5)(6) uses the sample of only children and children with younger brothers, and column (7)(8) uses the sample of only children and children with older sisters. N is the total number of observations in each regression
Standard errors in parentheses
* p value < 0.1 (marginally significant)
**p value < 0.05, ***p value < 0.01