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. 2018 Oct 23;15(11):2341. doi: 10.3390/ijerph15112341

Table 3.

Child development outcomes and caregiver’s mental health across different subpopulations.

Variables Full Sample Western China Rural Communities Resettlement Communities Central China Rural Communities Migrant Communities Difference: (2)–(3) Difference: (2)–(4) Difference: (2)–(5)
Mean Mean Mean Mean Mean p-Value p-Value p-Value
(SD) (SD) (SD) (SD) (SD)
(1) (2) (3) (4) (5) (6) (7) (8)
Child development outcomes
Cognitive delay 0.48 0.53 0.50 0.47 0.42 0.55 0.17 <0.01
(1 = yes) (0.50) (0.50) (0.50) (0.50) (0.49)
Language delay 0.52 0.61 0.53 0.50 0.40 0.10 0.02 <0.01
(1 = yes) (0.50) (0.49) (0.50) (0.50) (0.49)
Social-emotional delay 0.53 0.58 0.65 0.53 0.39 0.12 0.27 <0.01
(1 = yes) (0.50) (0.49) (0.48) (0.50) (0.49)
Motor delay 0.30 0.36 0.33 0.30 0.18 0.57 0.18 <0.01
(1 = yes) (0.46) (0.48) (0.47) (0.46) (0.39)
Caregiver’s mental health
Depression 0.25 0.23 0.26 0.28 0.23 0.48 0.17 0.90
(1 = yes) (0.43) (0.42) (0.44) (0.45) (0.42)
Anxiety 0.29 0.28 0.33 0.32 0.21 0.27 0.31 0.05
(1 = yes) (0.45) (0.45) (0.47) (0.47) (0.41)
Stress 0.16 0.15 0.21 0.15 0.20 0.06 0.86 0.07
(1 = yes) (0.37) (0.35) (0.41) (0.36) (0.40)
Depression/Anxiety/Stress 0.39 0.37 0.43 0.43 0.38 0.17 0.17 0.81
(1 = yes) (0.49) (0.48) (0.50) (0.50) (0.49)
Observations 2514 2061 129 124 200

Notes: We used sampling weights to calculate the summary statistics for each observation. We used the following formula to calculate the sampling weights: sampling weight = proportion of subpopulation in total population/proportion of subpopulation in sample. The subpopulation proportions in rural China’s total population are 37.7% for western China rural communities, 1.4% for resettlement migration communities, 42.0% for central China rural communities, and 18.8% for migrant communities. Next, in our sample, the subpopulation proportions are 82% for western rural communities, 5% for resettlement migration communities, 5% for central rural communities, and 8% for migrant communities. Therefore, the final sampling weights for each subpopulation are 0.46 for western China rural communities (equal to 37.7%/82%), 0.28 for resettlement migration villages (equal to 1.4%/5%), 8.4 for central China rural communities (equal to 42%/5%), and 2.35 for migrant communities (equal to 18.8%/8%). For the descriptive statistics of child development outcomes and the caregiver’s mental health, column 6 shows the p-value of the difference between column 2 and column 3; column 7 shows the p-value of the difference between column 2 and column 4; column 8 shows the p-value of the difference between column 2 and column 5.