Doyle, O. (2020). The first 2,000 days and child skills. Journal of Political Economy, 128(6), 2067-2122.
Peer Reviewed
| Design | Attrition | Baseline equivalence | Confounding factors? | Valid, reliable measures? |
|---|---|---|---|---|
| Randomized controlled trial | Low |
Not assessed for randomized controlled trials with low attrition |
No |
Yes |
Notes from the review of this manuscript
Information on how certain measures were constructed and their reliability were based on correspondence with the author. Several findings not reported in the tables below received a low rating because they did not satisfy the reliability requirement. Findings reported when children in the sample were 36 months old and older are ineligible for review because high PFL families were offered Triple P, a parenting course promoting healthy parenting practices and positive parent-child attachment, when children were between 24 and 36 months old, and the low PFL group was not offered these services. HomVEE's calculations for statistical significance are used because authors' calculations are based on one-tailed statistical tests.
| Outcome Measure | Timing of Follow-Up | Rating | Direction of Effect | Effect Size (Absolute Value) | Stastical Significance | Sample Size | Sample Description |
|---|---|---|---|---|---|---|---|
| Ages and Stages Questionnaire (ASQ): Communication scores, Inverse Probability Weighted percentage below average | 24 months old | High | 0.13 | Not statistically significant, p = 0.48 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Ages and Stages Questionnaire (ASQ): Communication scores, Inverse Probability Weighted results | 24 months old | High | 0.01 | Not statistically significant, p = 0.94 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Brief Infant-Toddler Social and Emotional Assessment (BITSEA): Competency score, Inverse Probability Weighted percentage cut-off: proportion at risk of clinically significant problems | 24 months old | High | 0.07 | Not statistically significant, p = 0.67 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Brief Infant-Toddler Social and Emotional Assessment (BITSEA): Competency score, Inverse Probability Weighted results | 24 months old | High | 0.06 | Not statistically significant, p = 0.71 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Brief Infant-Toddler Social and Emotional Assessment (BITSEA): Problems score, Inverse Probability Weighted percentage cut-off: proportion at risk of clinically significant problems | 24 months old | High | 0.24 | Not statistically significant, p = 0.10 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Brief Infant-Toddler Social and Emotional Assessment (BITSEA): Problems score, Inverse Probability Weighted results | 24 months old | High | 0.19 | Not statistically significant, p = 0.16 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Externalizing scores, Inverse Probability Weighted percentage cut-off: proportion at risk of clinically significant problems | 24 months old | High | 0.21 | Not statistically significant, p = 0.08 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Externalizing scores, Inverse Probability Weighted results | 24 months old | High | 0.11 | Not statistically significant, p = 0.44 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Internalizing scores, Inverse Probability Weighted percentage cut-off: proportion at risk of clinically significant problems | 24 months old | High | 0.24 | Not statistically significant, p = 0.06 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Internalizing scores, Inverse Probability Weighted results | 24 months old | High | 0.07 | Not statistically significant, p = 0.63 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Total score, Inverse Probability Weighted percentage cut-off: proportion at risk of clinically significant problems | 24 months old | High | 0.32 | Statistically significant, p = 0.01 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Child Behavior Checklist (CBCL): Total score, Inverse Probability Weighted results | 24 months old | High | 0.18 | Not statistically significant, p = 0.20 | 164 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Development Profile cognitive development score (DP-3), Inverse Probability Weighted percentage above average | 24 months old | High | 0.42 | Not statistically significant, p = 0.12 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample | |
| Development Profile cognitive development score (DP-3), Inverse Probability Weighted results | 24 months old | High | 0.22 | Not statistically significant, p = 0.13 | 166 children | High PFL vs. Low PFL; Dublin, Ireland 2008-2010; full sample |
This study included participants from the following locations:
- State not reported or international
Study participants were pregnant women recruited in a maternity hospital or in the community. A total of 233 pregnant women were randomly assigned to either the Preparing for Life—Home Visiting group that received home visiting services (“high PFL”; 115 participants) or the comparison condition that did not receive home visiting services (“low PFL”; 118 participants). The study included a total of 166 participants, 82 in the high PFL group and 84 in the low PFL comparison group. Outcomes were measured when the children in the sample were 24, 36, and 48 months old. At intake, the average age of the mothers was 25. The percentage of mothers identifying as Irish was 96 percent, and 4 percent identified as Irish Traveller. About half of the women were first-time mothers.
The study took place in North Dublin, Ireland.
Note: Navigate to the model page for more information about the home visiting model. See the source manuscript for more information about how the model was implemented in this study.
Participants in the low PFL (comparison) group did not have access to the home visiting services or tip sheets. The comparison group did, however, receive some of the same resources made available to the high PFL (intervention) group, including the package of safety items and toys. These participants had access to an information officer who met with participants before the child’s birth and at various intervals after birth and provided information on Preparing for Life community events and other local services. Participants in the comparison group had access to public health workshops, such as a stress-control program and a healthy food program.
• Child gender (boy or girl) • Parity (primiparous)
The Atlantic Philanthropies and the Department of Children and Youth Affairs (Ireland) supported the research.