Care Across Contexts: Patterns of Caregiver-Infant Engagement in Spanish- and English-Speaking Families of Preterm Infants

This prospective cohort study found that while Spanish- and English-speaking families of preterm infants generally exhibited comparable patterns of caregiver-infant engagement, skin-to-skin care varied significantly within Spanish-speaking groups and served as a key predictor for verbal engagement at home, highlighting a continuity of care from the hospital to the home environment.

The Gist

Imagine the Neonatal Intensive Care Unit (NICU) as a high-stakes training camp for tiny athletes (preterm babies) and their coaches (parents). The goal is to get the baby strong enough to go home and thrive.

This study asked a big question: Do the "coaches" from Spanish-speaking families and English-speaking families play the same game, or are there different rules and strategies?

Here is the breakdown of what the researchers found, using simple analogies.

1. The Setup: Two Teams, One Goal

The researchers looked at 40 families with babies born very early (before 32 weeks).

• Team A: 23 English-speaking families.
• Team B: 17 Spanish-speaking families.

They knew that Team B often faced bigger hurdles in life (like lower income), which usually makes things harder. They wanted to see if these hurdles changed how these parents interacted with their babies in the hospital and at home.

2. The Three "Stats" They Measured

To understand how the parents were doing, they tracked three specific things:

• Visitation (Showing Up): How often did parents visit the hospital?
  • The Result: It was a tie. Both groups visited about once a day. It didn't matter if you spoke Spanish or English; everyone showed up to cheer on their baby.
• Skin-to-Skin (The "Kangaroo" Huddle): This is when a parent holds the naked baby against their bare chest. It's like a warm, protective hug that helps the baby regulate their heartbeat and temperature.
  • The Result: The average was similar, but the distribution was different. On average, both groups did about 30 minutes a day. However, if you looked at the individual families, most Spanish-speaking families were at the "low end" of the scale (doing very little), while English-speaking families were spread out more evenly. It's like two basketball teams having the same average score, but one team has a few superstars and the other has a few players who barely played at all.
• Talk Time (The "Chatter" at Home): Once the babies went home, the researchers used special recorders (like a "language pedometer") to count how many words the parents spoke to the baby every hour.
  • The Result: Another tie. Once the babies were home, both groups talked to their babies at almost the exact same rate (about 1,700 words an hour). The language barrier didn't stop the love and chatter.

3. The Big Discovery: The "Bridge" Effect

This is the most important part of the story. The researchers found a magic bridge connecting the hospital to the home.

• The Analogy: Think of Skin-to-Skin care in the hospital as planting a seed.
• The Finding: The more a parent held their baby skin-to-skin in the hospital (planted the seed), the more they talked to the baby once they got home (the flower grew).
• The Twist: It didn't matter if the parent spoke Spanish or English. The "seed" of holding the baby in the hospital predicted the "flower" of talking at home for everyone.

Even though the Spanish-speaking families had lower incomes and faced more barriers, the act of holding the baby in the hospital was the key that unlocked more talking at home.

4. What Does This Mean for Us?

• Don't Assume Differences: Just because a family speaks a different language or has less money, doesn't mean they love their baby less or visit less. They showed up just as much.
• The "Hug" is the Key: The study suggests that hospitals should focus heavily on teaching and encouraging Skin-to-Skin care. It's not just a medical procedure; it's a training session that teaches parents how to connect with their baby.
• Continuity: If you help a parent feel confident holding their baby in the scary hospital environment, that confidence travels home with them, turning into more conversation and connection.

In a nutshell:
Whether you speak Spanish or English, parents of preterm babies are eager to be involved. But the physical act of holding the baby in the hospital is the secret sauce that helps parents keep that connection strong once they leave the hospital and go home. It's the practice run that makes the real game better.

Technical Summary

1. Problem Statement

Children from Spanish-speaking families in the U.S. often face distinct environmental and sociocultural circumstances compared to English-speaking families, including lower socioeconomic status (SES) and potential barriers in healthcare communication (e.g., limited interpreter access, language concordance issues). These factors are particularly critical for families of preterm infants (<32 weeks gestation), who require prolonged interaction with complex healthcare systems.

Prior literature suggests disparities in Skin-to-Skin (STS) care (kangaroo care) and hospital visitation based on language and SES, which are linked to neurodevelopmental outcomes. Furthermore, while continuity between hospital-based care and home-based verbal engagement has been observed, it remains unclear if these patterns differ by language group. The study aims to:

• Compare caregiver-infant engagement metrics (visitation, STS care, and home verbal engagement) between Spanish- and English-speaking families.
• Investigate the continuity of caregiving patterns from the Neonatal Intensive Care Unit (NICU) to the home environment.
• Determine if language group moderates the relationship between hospital engagement and later home verbal engagement, controlling for SES.

2. Methodology

Study Design & Participants

• Type: Prospective cohort study.
• Sample: $N = 40$ families with infants born very preterm (<32 weeks gestation).
  • Spanish-speaking: $n = 17$ (100% Hispanic ethnicity).
  • English-speaking: $n = 23$ (22% Hispanic ethnicity).
• Inclusion Criteria: Born <32 weeks, no congenital/genetic anomalies, no hearing/vision loss, inborn with a hospital stay >20 days, and primary caregivers speaking English or Spanish.
• Exclusions: Outborn infants, stays <20 days, or missing home engagement data.
• Demographics: Spanish-speaking families had significantly lower SES (Hollingshead Index) and infants were born at a significantly earlier gestational age (GA) than English-speaking families. These were controlled for in analyses.

Measures

1. Hospital Visitation: Calculated as total visitation instances divided by the number of hospital days (visits/day), extracted from nurse documentation.
2. Skin-to-Skin (STS) Care: Calculated as total minutes of family-delivered STS care divided by hospital days (STS minutes/day), extracted from nurse charting.
3. Home Verbal Engagement: Measured using the LENA (Language Environment Analysis) system.
   • Metric: Child-Directed Adult Word Counts per hour (CD-AWC/hour).
   • Protocol: Day-long audio recordings (approx. 16 hours) taken at 9 or 15 months of age.
   • Processing: Automated classifiers identified non-sleep, child-directed segments to calculate CD-AWC/hour.

Statistical Analysis

• Software: R (version 4.5.2).
• Models: Hierarchical linear mixed-effects models with family ID as a random intercept (to account for multiples).
• Covariates: Socioeconomic Status (SES) and Gestational Age (GA) were included in all primary models.
• Hypothesis Testing:
  • Group differences in visitation, STS, and CD-AWC/hour.
  • Predictive relations between hospital metrics and home CD-AWC/hour.
  • Moderation effects of language group on these predictive relations.

3. Key Results

A. Hospital-Based Engagement (Neonatal Period)

• Visitation: No significant difference between groups. Both groups averaged approximately 1 visit per day.
• STS Care:
  • Overall average was ~30 minutes/day with high variability (0 to 108 mins/day).
  • Statistical Finding: After controlling for SES and GA, the difference between Spanish- and English-speaking groups was not statistically significant ($p = 0.21$).
  • Descriptive Trend: Despite the lack of statistical significance, Spanish-speaking families showed a trend toward lower STS rates, with most falling in the bottom of the distribution compared to English-speaking families.

B. Home-Based Engagement (9–15 Months)

• CD-AWC/hour: No significant difference between language groups. Both groups averaged approximately 1,700 CD-AWC/hour.
• Model Fit: Language group and SES together explained only 5% of the variance in home verbal engagement.

C. Continuity from Hospital to Home

• Visitation: Hospital visitation rates did not significantly predict home CD-AWC/hour.
• STS Care: Hospital STS care was a significant predictor of home verbal engagement.
  • Effect Size: Each additional minute of STS care per day during the hospital stay was associated with approximately 15 more CD-AWC/hour at home ($\beta = 14.95, p < 0.01$).
  • Variance: STS care accounted for an additional 28% of the variance in home verbal engagement.
• Moderation: Language group did not moderate the relationship between STS care and home verbal engagement. The continuity effect was robust across both Spanish- and English-speaking families.

4. Key Contributions

• Objective Measurement: Utilized nurse-charted data for STS and automated LENA recordings for home speech, reducing observer bias and providing high-fidelity, objective metrics.
• Disentangling Language and SES: By controlling for SES (which was significantly different between groups), the study isolated the specific effects of language background, finding that language group itself did not drive differences in engagement continuity.
• Identification of a Specific Predictor: The study identified STS care (but not general visitation) as the critical hospital-based factor predicting later home verbal engagement.
• Continuity Evidence: Provided empirical evidence that early physical caregiving (STS) in the NICU establishes a trajectory for verbal engagement at home, regardless of the family's language background.

5. Significance and Implications

• Clinical Practice: The findings suggest that interventions promoting STS care in the NICU are likely to have downstream benefits for the home language environment for all families, regardless of language or SES.
• Equity: While the study did not find statistically significant group differences in STS (likely due to sample size or specific unit practices), the descriptive trend of lower STS in Spanish-speaking families highlights a potential area for targeted support.
• Intervention Targets: The NICU represents a "critical window" for intervention. Structured, culturally-responsive programs to increase STS participation could potentially sustain and enhance caregiver-infant verbal interactions after discharge.
• Future Research: The authors call for larger, multi-site studies to confirm these trends and prospective clinical trials to test if targeted NICU interventions can causally improve long-term developmental trajectories.

Limitations: Modest sample size ($N=40$), single-site study (Stanford/LPCH), and correlational design (precluding causal inference).