Publications by authors named "Katri Lahti"

Background: Immigrant adolescents seem to be at risk for victimization and being victimized in adolescence is related to risk factors regarding mental health.

Objective: This study compared the frequency and type of victimization experiences among immigrant and native Finnish adolescents and tested whether these experiences mediate the relationship between immigration status and psychosocial well-being. Additionally, willingness to disclose victimization experiences in anonymous questionnaires was compared between the groups.

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Background: Major brain injuries in structural brain magnetic resonance imaging (MRI) at term affect concurrent diffusion tensor imaging (DTI) parameters in very preterm infants. White matter is known to gradually maturate along with increasing gestational age, which is characterized by increasing fractional anisotropy (FA) and decreasing mean diffusivity (MD).

Purpose: To study the difference between DTI parameters at term and 13 years in adolescents born very preterm with and without major pathologies in structural brain MRI at term.

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Adolescents born very preterm have an increased risk for anxiety, social difficulties and inattentiveness, i.e. the 'preterm behavioural phenotype'.

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Background: Diffusion tensor imaging is a widely used imaging method of brain white matter, but it is prone to imaging artifacts. The data corrections can affect the measured values.

Objective: To explore the impact of susceptibility correction on diffusion metrics.

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Objectives: Impairments in visual perception are among the most common developmental difficulties related to being born prematurely, and they are often accompanied by problems in other developmental domains. Neural activation in participants born prematurely and full-term during tasks that assess several areas of visual perception has not been studied. To better understand the neural substrates of the visual perceptual impairments, we compared behavioral performance and brain activations during visual perception tasks in adolescents born very preterm (birth weight ≤1500 g or gestational age <32 weeks) and full-term.

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Objective: To evaluate the rate of developmental coordination disorder (DCD) and its correlation to cognition and self-experienced health-related quality of life (HRQoL) in children born very preterm.

Design: Prospective follow-up study.

Setting: Regional population of children born very preterm in Turku University Hospital, Finland, in 2001-2006.

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Aim: Very preterm children born <32 weeks of gestation are at risk for motor difficulties such as cerebral palsy and developmental coordination disorder. This study explores the association between diffusion tensor imaging metrics at term and motor outcomes at 11 years of age.

Methods: A cohort of 37 very preterm infants (mean gestational age 29 4/7, SD 2 0/7) born in 2004-2006 in Turku University Hospital underwent diffusion tensor imaging at term.

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We examined, first, how prenatal maternal mental health and war trauma predicted mothers' experience of their infant crying, indicated by emotions, cognitions, and behavior; and second, how these experiences influenced the mother-infant interaction and infant development. Participants were 511 Palestinian mothers from the Gaza Strip, reporting their war trauma, symptoms of posttraumatic stress disorder (PTSD), depression, and perceived stress during pregnancy (Time 1). They reported experiences of infant crying at 4 months (Time 2), and the mother-infant interaction and infant sensorimotor and language development at 12 months of infants' age (Time 3).

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Background: The predictive value of the combination of neurological examination and brain magnetic resonance imaging (MRI) or cranial ultrasound (cUS) in preterm infants is not known.

Aims: To study the prognostic value of the combination of neurological examination and brain MRI at term equivalent age (TEA) or serial neonatal cUS in very preterm infants for neurosensory outcome at 2 years of corrected age.

Study Design: A prospective follow-up study.

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