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Dive into the research topics where Jaakko Matomäki is active.

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Featured researches published by Jaakko Matomäki.


Developmental Medicine & Child Neurology | 2011

Cognitive and neuropsychological outcomes at 5 years of age in preterm children born in the 2000s

Annika Lind; Marit Korkman; Liisa Lehtonen; Helena Lapinleimu; Riitta Parkkola; Jaakko Matomäki; Leena Haataja

Aim  The aim of this study was to assess the cognitive level and neuropsychological performance at 5 years of age in children with a very low birthweight (VLBW; birthweight <1501g) born in 2001 to 2003.


Pediatrics | 2014

Antenatal and Postnatal Growth and 5-Year Cognitive Outcome in Very Preterm Infants

Marika Leppänen; Helena Lapinleimu; Annika Lind; Jaakko Matomäki; Liisa Lehtonen; Leena Haataja; Päivi Rautava

OBJECTIVES: To study how antenatal growth affects cognitive outcome in very preterm infants and to determine whether there is an association between growth in any particular time period between birth and 5 years of age and cognitive outcome. Small for gestational age (SGA) and non-SGA infants were analyzed separately, because antenatal growth may affect postnatal growth. METHODS: Very low birth weight (<1501 g) infants born between 2001 and 2006 and infants born at <32 gestational weeks between 2004 and 2006 who were treated at Turku University Hospital (n = 181) were followed. Weight, length, and head circumference (HC) of the infants were measured at 9 time points between birth and 5 years. The growth was determined as a z score change between measurement points. Cognitive development was assessed at 5 years of age with the Wechsler Preschool and Primary Scales of Intelligence–Revised. The association between growth and full-scale IQ (FSIQ) was studied. RESULTS: Growth in length and height was not associated with 5-year cognitive outcome. However, weight (r = 0.18, P = .04) and HC growth (r = 0.25, P = .01) between birth and 2 years of corrected age correlated to FSIQ in non-SGA children. In SGA children, HC growth (r = 0.33, P = .03) around term age correlated to FSIQ. CONCLUSIONS: Cognitive outcome was similar in SGA and non-SGA very preterm infants. Growth affected cognition positively in both subgroups, but the critical time period was different.


Gynecologic Oncology | 2013

A prospective comparison of integrated FDG-PET/contrast-enhanced CT and contrast-enhanced CT for pretreatment imaging of advanced epithelial ovarian cancer.

Johanna Hynninen; Jukka Kemppainen; Maija Lavonius; Johanna Virtanen; Jaakko Matomäki; Sinikka Oksa; Olli Carpén; Seija Grénman; Marko Seppänen; Annika Auranen

OBJECTIVE The use of tumor debulking surgery in the management of epithelial ovarian cancer (EOC), which is often disseminated in the peritoneal cavity at the time of diagnosis, has a significant impact on prognosis. We compared (18)F-fluorodeoxyglucose (FDG) positron emission tomography/contrast-enhanced computed tomography (PET/CT) to contrast-enhanced CT for the detection of dissemination into the abdominal cavity preventing successful primary debulking surgery. METHODS Forty-one women with EOC underwent preoperative whole-body low-dose FDG-PET/CT followed by diagnostic high dose contrast-enhanced CT scan, and the results were compared with systematically recorded surgical findings as a reference standard. Both site-based and patient-based analyses were conducted. RESULTS FDG-PET/CT was superior to conventional CT for the detection of carcinomatosis in subdiaphragmatic peritoneal surfaces (p=0.020) and in the bowel mesentery (p=0.001). Patient-based analysis of upper abdominal areas requiring extensive surgical procedures showed no significant differences between the two imaging methods. The sensitivity of PET/CT and CT was poor in certain areas of the peritoneal cavity (64% vs. 27% in the small bowel mesentery and 65% vs. 55% in the right upper abdomen). Extra-abdominal disease spread was detected by PET/CT in 32 patients and by CT in 25 patients. CONCLUSIONS PET/CT was not superior to CT for the detection of intra-abdominal disease spread. Patients with suspected EOC should be referred for upfront radical surgery regardless of the results of preoperative imaging studies. PET/CT is more effective for the detection of extra-abdominal disease than CT, but the clinical significance of this finding is unclear.


International Journal of Cancer | 2014

Cardiovascular morbidity in long-term survivors of early-onset cancer: A population-based study

A.E. Kero; Liisa S. Järvelä; Mikko Arola; Nea Malila; Laura Madanat-Harjuoja; Jaakko Matomäki; Päivi M. Lähteenmäki

Improvements in cancer therapy have resulted in an expanding population of early‐onset cancer survivors. In contrast to childhood and adolescent cancer survivors, there is still a lack of data concerning late morbidities among young adult (YA) cancer survivors. Thus, our aim was to investigate cardiac and vascular morbidity among early‐onset cancer survivors with a special interest in YA cancer survivors. In a population‐based setting, we explored the risk of cardiovascular disease in early‐onset cancer survivors compared to healthy siblings. Patients diagnosed with cancer below 35 years of age since 1975 were identified from the Finnish Cancer Registry, and 5‐year survivors were included in our study (N = 13,860). Information on cardiovascular morbidity was collected from the national hospital discharge registry. Compared to siblings, cancer survivors aged 0–19 and 20–34 at diagnosis had significantly elevated hazard ratios (HRs) for the studied outcomes: HR 13.5 (95% CI 8.9–20.4) and 3.6 (95% CI 2.8–4.6) for cardiomyopathy/cardiac insufficiency; HR 3.4 (95% CI 2.3–5.1) and 1.7 (95% CI 1.4–2.0) for atherosclerosis/brain vascular thrombosis; HR 3.3 (95% CI 1.7–6.5) and 1.8 (95% CI 1.5–2.1) for myocardial infarction/cardiac ischemia and HR 1.7 (95% CI 1.2–2.6) and 1.4 (95% CI 1.2–1.7) for cardiac arrhythmia. In both groups, depending on the outcome, the HR for adverse events was highest among lymphoma, brain tumor, leukemia and testicular malignancy survivors. Our results regarding late effects of childhood cancer survivors confirmed previous findings. Additionally, our study provides novel information concerning the YA cancer survivor population. Hence, our data may help in planning the risk‐based long‐term follow‐up of early‐onset cancer survivors.


Acta Paediatrica | 2010

Incidence of necrotizing enterocolitis in very-low-birth-weight infants related to the use of Lactobacillus GG

Raakel Luoto; Jaakko Matomäki; Erika Isolauri; Liisa Lehtonen

Background:  One of the five level III neonatal intensive care units (NICU) in Finland has used prophylactic Lactobacillus GG (LGG) for very‐low‐birth‐weight (VLBW) infants since 1997.


Developmental Medicine & Child Neurology | 2011

Ventricular dilatation in relation to outcome at 2 years of age in very preterm infants: a prospective Finnish cohort study.

Jonna Maunu; Liisa Lehtonen; Helena Lapinleimu; Jaakko Matomäki; Petriina Munck; Hellevi Rikalainen; Riitta Parkkola; Leena Haataja

Aim  The aim of this study was to analyse the relation between ventricular dilatation at term and neurodevelopmental outcome at 2 years corrected age in infants of very low birthweight (VLBW) or very low gestational age (VLGA).


Gynecologic Oncology | 2012

Serum HE4 concentration is not dependent on menstrual cycle or hormonal treatment among endometriosis patients and healthy premenopausal women

Marianne Hallamaa; Pia Suvitie; Kaisa Huhtinen; Jaakko Matomäki; Matti Poutanen; Antti Perheentupa

OBJECTIVE Human epididymal secretory protein E4 (HE4) is a new promising tumor marker developed for the diagnostics and follow up of ovarian cancer. It has yet to become widely accepted in clinical practice, and its biological properties have not been inclusively studied. The aim of this study was to investigate whether serum HE4 concentration varies within the normal menstrual cycle and whether common gynecological hormonal treatments have an effect on HE4 values. METHODS Our study population consisted of 180 women, including 126 endometriosis patients and 54 healthy women. We measured their serum HE4 and CA125 concentrations and evaluated the effect of the menstrual cycle and the possible hormonal medication on these marker concentrations. RESULTS We found no significant variation in serum HE4 concentrations in samples taken at different phases of the menstrual cycle. The median HE4 concentrations in proliferative, secretory and menstrual phase were 41.5, 45.1 and 35.3 pM in healthy women, and 43.4, 44.3 and 43.0 pM in endometriosis patients, respectively. The use of combined estrogen and progestin contraceptives did not affect serum HE4 levels significantly. CONCLUSIONS The present study shows that the HE4 measurement in healthy premenopausal women as well as in women with endometriosis can be carried out at any phase of the menstrual cycle, and irrespective of hormonal medication, extending the benefits of HE4 use in clinical practice.


Acta Obstetricia et Gynecologica Scandinavica | 2012

Sexual functioning, quality of life and pelvic pain 12 months after endometriosis surgery including vaginal resection

Marjaleena Setälä; Päivi Härkki; Jaakko Matomäki; Juha Mäkinen; Jyrki Kössi

Objective. To evaluate sexual function, quality of life and pelvic pain after endometriosis surgery including vaginal resection. Design. Prospective observational study with 12 months follow up. Setting. Regional central hospital and university hospital. Population. Twenty‐two patients with deep endometriotic nodules in the posterior fornix of the vagina undergoing complete excision of endometriosis, including vaginal resection. Methods. Sexual functioning was measured with the McCoy Female Sexuality Questionnaire, quality of life with a generic questionnaire (15D) and pain with a 10‐point visual analog scale. Questionnaires were completed before and 12 months after the surgery. Main outcome measures. Changes in sexual function scores, quality‐of‐life scores and pain. Results. Twelve months after surgery, the sexual satisfaction score was higher (p= 0.03) and the sexual problems score lower (p= 0.04) compared with baseline values. Health‐related quality‐of‐life scores for discomfort and symptoms (p= 0.001), distress (p= 0.04), vitality (p= 0.03) and sexual activity (p= 0.001), and the overall 15D score (p < 0.001), were significantly improved. The severity of all studied types of pain was significantly decreased (p < 0.05). Conclusions. Complete excision of endometriosis, including vaginal resection, seems to offer a significant improvement in sexual functioning, quality of life and pelvic pain in symptomatic patients with deeply infiltrating endometriotic nodules in the posterior fornix of the vagina. This surgery may be associated with complications and adverse new‐onset symptoms, and should be performed only after thorough consultation with the patient.


International Journal of Cancer | 2015

Late mortality among 5-year survivors of early onset cancer: A population-based register study

A.E. Kero; Liisa S. Järvelä; Mikko Arola; Nea Malila; Laura Madanat-Harjuoja; Jaakko Matomäki; Päivi M. Lähteenmäki

To date, only few studies have been published documenting late mortality among early onset cancer survivors, especially regarding young adulthood (YA) malignancies. Our nation‐wide population‐based registry study provides information concerning cause‐specific long‐term mortality among 16,769 5‐year survivors of early onset cancer (aged 0–34 years at diagnosis), with follow‐up for death extending from 1971 through 2012. A sibling cohort and population data were used as reference. The overall standardized mortality ratio (SMR) of cancer patients was 4.6‐fold, (95% CI 4.4–4.8). Highest SMRs were found for malignancies (12.8, 95% CI 12.3–13.3), infectious (4.8, 95%CI 2.9–6.7) and cardiovascular diseases (1.9, 95% CI 1.7–2.1). Malignancies and cardiovascular diseases accounted for the largest number of deaths. Childhood and YA cancer survivors with the same primary cancer site had a similarly elevated overall SMR with the exception of markedly higher SMRs after childhood Hodgkin lymphoma. The highest cumulative non‐malignancy‐related mortality was due to cardiovascular disease with a steady rise throughout the follow‐up, but strongly dependent on the primary cancer site and age at diagnosis. In childhood cancer survivors, the cumulative cardiovascular mortality did not reduce over time. However, overall and malignancy‐related mortality showed a declining tendency towards the most recent periods after both, childhood and YA cancer. Our findings on non‐malignancy‐related mortality stress the need to set up long‐term individual follow‐up with a focus on cardiovascular late effects for early onset cancer survivors, especially for YA cancer survivors still lacking those.


Child Psychiatry & Human Development | 2012

Experiences of School Bullying Among Internationally Adopted Children: Results from the Finnish Adoption (FINADO) Study

Hanna Raaska; Helena Lapinleimu; Jari Sinkkonen; Christina Salmivalli; Jaakko Matomäki; Sanna Mäkipää; Marko Elovainio

This study investigated the prevalence of and factors associated with school bullying and victimization among Finnish international adoptees. The Olweus bully/victim questionnaire was sent to all 9–15-year-old children adopted in Finland between 1985 and 2007 through the mediating organizations officially approved by the Ministry of Social Affairs and Health. The children were identified through official adoption organizations. The response rate in the target sample was 49.4%: the study sample consisted of 364 children (190 girls, 52.2%). The children’s background factors and symptoms of reactive attachment disorder (RAD) were evaluated using a FINADO questionnaire. Their learning difficulties and social and language skills were assessed using a standardized parental questionnaire (Five to Fifteen). Of the participants, 19.8% reported victimization by peers while 8% had bullied others. Both victimization and bullying were associated with severe symptoms of RAD at the time of adoption (RR 2.68, 95%CI 1.50–4.77 and RR 2.08, 95%CI 1.17–3.69 for victimization and bullying, respectively). Lack of social skills was associated with victimization (RR 1.74, 95%CI 1.06–2.85) but not independently with being a bully (RR 1.50, 95%CI 0.91–2.45). In a multivariate analysis the child’s learning difficulties and language difficulties were not associated with either bullying others or victimization.

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Liisa Lehtonen

Turku University Hospital

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Riitta Parkkola

Turku University Hospital

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Hanna Raaska

Helsinki University Central Hospital

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Päivi Rautava

Turku University Hospital

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Suvi Stolt

University of Helsinki

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