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• Studies reported that children in child care are more likely to have disrupted patterns of diurnal cortisol secretion. • Children in child care can benefit from a social skills training as it is inexpensive and easy to implement by educators. • Our social skills training led to decreasing diurnal cortisol secretion patterns in preschoolers in child care. • Children from lower-income families benefit the most from such a program. Most preschool children in Western industrialized countries attend child care during the day while parents work. Studies suggest that child care may be stressful to young children, perhaps because they still lack the social skills to interact daily in a group setting away from parents. This gap in social abilities may be greater for children in lower-income families, who may face more adversity at home, with fewer resources and more social isolation. We conducted a cluster-randomized controlled trial in 2013–2014 to test whether a social skills intervention led by early childhood educators within the child care center could reduce diurnal cortisol levels to more typical patterns expected of children this age. We randomized 19 public child care centers (n = 361 children) in low-income neighborhoods of Montreal, Canada, to either: 1) the Minipally program – intervention group (n = 10 centers; 186 children), or 2) waiting list – control group (n = 9 centers; 175 children). Saliva samples for cortisol levels were collected 3 times/day, pre- and post-implementation. The Minipally puppet program consists of 2 workshops/month for 8 months for the development of social skills and self-regulation in 2–5-year-olds, with reinforcement activities between workshops. Educators received 2-days' training and 12 h' supervision in Minipally. Linear mixed models for repeated measures revealed a significant interaction between intervention status and time of day of cortisol sampling (β = −0.18, p = 0.04). The intervention group showed patterns of decreasing diurnal cortisol secretion (β = −0.32, p < 0.01), whereas the control group showed increasing slopes (β = 0.20, p < 0.01). Moreover, family income was a moderator; children in lower-income families benefited most from the intervention. Results suggest that a social skills training program, when integrated into a preschool education curriculum, can foster an environment more conducive to typical childhood patterns of cortisol secretion. [ABSTRACT FROM AUTHOR]

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In 1997 Quebec adopted a policy providing universal pre-school daycare for five dollars per day. Comparing Quebec to the rest of Canada, we use the 1996, 2001, and 2006 Canadian censuses to determine the impact of this policy on couples' strategies for combining employment and child care. As well as increasing female labour force participation, the policy reduced the number of families with a traditional division of labour, showing greater effects on common-law than on married couples. These effects, however, are considerably smaller than are differences related to the two parents' human capital. [ABSTRACT FROM AUTHOR]

High knee flexion postures, despite their association with increased incidences of osteoarthritis, are frequently adopted in occupational childcare. This study sought to define and quantify high flexion postures typically adopted in childcare to evaluate any increased likelihood of knee osteoarthritis development. Through video analysis of eighteen childcare workers caring for infant, toddler, and preschool-aged children, eight high knee flexion postures were identified and quantified by duration and frequency. An analysis of postural adoption by task was subsequently performed to determine which might pose the greatest risk for cumulative joint trauma. Childcare workers caring for children of all ages were found to adopt kneeling and seated postures for extended durations and at elevated frequencies, exceeding proposed thresholds for incidences of knee osteoarthritis development. Structured activities, playing, and feeding tasks demanded the greatest adoption of high flexion postures and should be evaluated to minimise the potential childcare-related risks of osteoarthritis. Practitioner summary: High knee flexion postures (kneeling, squatting, etc.) have been associated with increased incidences of knee injury yet are commonly adopted in childcare. Childcare workers' postures were examined through video analysis revealing that proposed adoption thresholds for knee health are commonly exceeded when caring for children of all ages. Abbreviations : OA: osteoarthritis; WSIB: workplace safety insurance board; CAD: Canadian Dollar; DK: dorsiflexed kneeling; PK: plantarflexed kneeling; SAK: single arm supported kneeling; DAK: double arm supported kneeling; FS: flatfoot squatting; HS: heels up squatting; FLRS: floor sitting; SS: side sitting or leaning; STLS: stool sitting; BR: bending and reaching.