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. 2023 Jun 12;17:72. doi: 10.1186/s13034-023-00602-1

Table 3.

Results of sub-sample estimates

Variables LB children NLB children
(1) (2) (3) (4)
Extraversion Non-extraversion Extraversion Non-extraversion
Panel A: Teacher personality
 LB classmates’ depression scores − 5.526*** − 0.958* − 9.835** 0.442***
(1.146) (0.380) (2.629) (0.112)
 NLB classmates’ depression scores − 9.438*** 1.310*** − 14.286** − 0.165
(1.789) (0.346) (3.997) (0.235)
 Observations 100 383 236 1,098
 R-squared 0.808 0.306 0.741 0.232
LB children NLB children
(1) (2) (3) (4)
Active Not active Active Not active
Panel B: Active parent–child communication
 LB classmates’ depression scores − 0.166 − 0.657* 0.430* 0.339**
(0.228) (0.299) (0.207) (0.122)
 NLB classmates’ depression scores 0.858*** 0.719** 0.207* 0.354**
(0.173) (0.223) (0.082) (0.103)
 Observations 223 260 636 698
 R-squared 0.314 0.315 0.193 0.223
LB children NLB children
(1) (2) (3) (4)
High quantity Low quantity High quantity Low quantity
Panel C: Friendship
 LB classmates’ depression scores − 0.180 − 0.802 0.143* 0.518***
(0.196) (0.433) (0.059) (0.141)
 NLB classmates’ depression scores 0.623*** 1.165** 0.534*** 0.133
(0.144) (0.403) (0.148) (0.150)
 Observations 276 207 784 550
 R-squared 0.227 0.329 0.182 0.199
LB children NLB children
(1) (2) (3) (4)
High quality Low quality High quality Low quality
LB classmates’ depression scores − 0.100 − 0.402 0.081 0.486**
(0.270) (0.282) (0.071) (0.170)
NLB classmates’ depression scores 0.459* 0.814** 0.490 0.110
(0.218) (0.245) (0.270) (0.153)
Observations 224 259 687 647
R-squared 0.237 0.322 0.158 0.219
Student and parent controls Yes Yes Yes Yes
Correlated effects controls Yes Yes Yes Yes
School-grade fixed effects Yes Yes Yes Yes

Student and parent controls include the child’s gender, age, only-child status, boarding-student status, adjusted self-rated health, mental development, time spent playing online games, guardian’s education, parent’s occupation and family economic status. Correlated effect controls include class size, head teacher’s career duration, gender, education, professional job title and age. Standard errors are clustered at the class level and reported in parentheses. The weight of the inclusion is 1/sample. Significance: *** p < 0.001, ** p < 0.01, * p < 0.05