Paula Virkkula

Sleep problems and daytime tiredness in Finnish preschool-aged children-a community survey.

BACKGROUND Sleep is important to the well-being and development of children. Specially, small children are vulnerable to the effects of inadequate sleep. However, not much is known about the frequency of all types of sleep problems and daytime tiredness in preschool-aged children. OBJECTIVE To evaluate the prevalence of a wide spectrum of sleep problems, daytime tiredness and associations between these in 3- to 6-year-old Finnish children. METHODS A population-based study where parents of 3- to 6-year-old children (n= 904) living in Helsinki filled in the Sleep Disturbance Scale for Children (SDSC). RESULTS Of the children, 45% had at least one sleep-related problem occurring at least three times a week: 14.1% were unwilling to go to bed, 10.2% had difficulties in falling asleep, 10.2% had bruxism, 6.4% sleep talking, 2.1% sleep terrors, 8.2% had sleep-related breathing problem, 11.2% had excessive sweating while falling asleep and 12.9% excessive sweating during sleep. Age and gender were related to phenotype of the sleeping problems. In multiple regression analysis, the difficulties in initiating and maintaining sleep were most strongly associated with tiredness in the morning and during the day. CONCLUSIONS Different types of sleep problems are frequent in preschool-aged children. Poor sleep quality is associated with morning and daytime tiredness. In screening for sleep problems in children, attention should be paid not only to sleep amount but also to sleep quality.

Mood is associated with snoring in preschool-aged children.

Objective: To study emotional and behavioral problems and sleep and cognitive performance in snoring and nonsnoring 3- to 6-year-old children. Methods: As part of an epidemiological study of sleep disordered breathing (SDB) in preschool-aged children, 43 snorers and 46 nonsnorers participated in a clinical study. Their parents completed the Child Behavior Checklist (CBCL). The children were assessed with Wechsler Preschool and Primary Scale of Intelligence, Revised and subtests of the Developmental Neuropsychological Assessment (NEPSY-A) representing aspects of attention, language skills, sensorimotor functions, memory, and learning. Results: On the CBCL snoring children had significantly more parent reported internalizing symptoms (p < .05) than the nonsnoring children, especially symptoms of anxious/depressed mood (p < .01) and emotional reactivity (p < .05). More children from the snoring group than from the nonsnoring group (22 vs 11%) scored in the subclinical or clinical range on the internalizing scale. Interestingly, no significant difference between the groups was found in the amount of externalizing symptoms. The amount of sleep problems other than snoring was higher in the snoring than in the nonsnoring group (p < .01). On tests measuring auditory attention (p < .01) and language skills (verbal IQ, p < .05), the snoring group performed worse than the nonsnoring group. Conclusions: Our results support the view that SDB should be considered a possible risk factor for mood disorder symptoms and impaired cognitive performance in children.

Nasal obstruction and sleep-disordered breathing: the effect of supine body position on nasal measurements in snorers.

Objective --Nasal obstruction is considered to be a potential etiological factor in sleep-disordered breathing. However, a significant correlation between nasal measurements and obstructive sleep apnea has not been demonstrated so far. The aim of this study was to investigate the relationships between nasal resistance, nasal volumes and selected sleep parameters using nasal measurements performed in both seated and supine positions. We also investigated whether snoring patients in our clinical sample showed increased positional or decongestive nasal mucosal changes. Material and Methods --Forty-one snoring men on a waiting list for correction of nasal obstruction underwent polysomnography, anterior rhinomanometry and acoustic rhinometry. Nineteen non-snoring control subjects were also recruited. Nasal measurements were performed in a seated position, after lying down in a supine position and, after decongestion of nasal mucosa, in a seated position again. Results --In the overall patient group, nasal volume at a distance 2-4 cm from the nares in the supine position correlated inversely with apnea-hypopnea index (AHI) ( r = m 0.32, p <0.05) and oxygen desaturation index (ODI) ( r = m 0.49, p <0.05). In the non-obese patients, total nasal resistance measured in a supine position correlated with AHI ( r =0.50, p <0.05) and ODI ( r =0.58, p <0.05) and supine nasal volumes were also inversely correlated with ODI. No significant correlations were found between baseline nasal measurements performed in a seated position and sleep parameters. Postural or decongestive changes in nasal measurements were not increased in snoring patients compared with control subjects. Conclusion --The relationship found between nasal measurements and sleep parameters suggests that nasal obstruction does augment airway collapse.

Sleep disturbances in a community sample from preschool to school age.

OBJECTIVE To study the prevalence of various sleep problems at school age in a Finnish community sample and to evaluate the persistence of the sleep problems from the preschool age to school age in a 4-year follow-up. METHODS Parents completed the Sleep Disturbance Scale for Children questionnaire on their childs sleep during the preschool years (3-6 years) and again during the school years (7-11 years). At follow-up the parents also completed a questionnaire on family structure and socio-economic status. RESULTS The parents of 481 children completed the questionnaires during both the first study and the follow-up (girls 49%, boys 51%; mean age 9, range 7-11). At the population level, sleep problems slightly declined from preschool to school age (P < 0.05). However, sleep problems at preschool age showed a strong persistence to school age. At the follow-up, 35% of the children who were considered to have a sleep disorder at preschool age still suffered from it at school age. At the community level, this equates to 9% of the children. The children with no sleep problems at preschool age rarely developed sleep problems at school age. CONCLUSIONS This study showed that various types of sleep problems are common at school age. Sleep problems persisted from preschool to school age at the individual level. It is important to recognize all types of sleep problems, especially persistent ones. Persistent sleep problems in children may cause and exacerbate other somatic, cognitive and psychiatric problems. Therefore, more attention should be focused on sleep problems in paediatric health care with interventions aimed particularly at children with prolonged sleep problems.

Frequency of Upper Airway Symptoms before and during Continuous Positive Airway Pressure Treatment in Patients with Obstructive Sleep Apnea Syndrome

Background: Upper airway side effects are common during nasal continuous positive airway pressure (nCPAP) treatment and may affect the use of nCPAP. Objectives: It was our aim to evaluate the prevalence of upper airway symptoms in obstructive sleep apnea syndrome (OSAS) patients before and during nCPAP treatment and to assess the possible association between the symptoms and long-term adherence to the treatment. Methods: We examined 385 consecutive OSAS patients (79% men, mean age ± SD 52 ± 10 years and apnea-hypopnea index 33 ± 23) by means of a prospective questionnaire-based survey. The patients filled in questionnaires about upper airway symptoms before starting nCPAP and after 2 months of treatment. Results: Upper airway symptoms were common before starting nCPAP: 61% of the patients reported dryness of mouth, 54% dryness of throat, 52% nasal stuffiness, 51% dryness of nose, 30% sneezing, 24% mucus in throat, 17% rhinorrhea, and 6% nose bleeds daily or almost daily. In CPAP users there was a significant decline in the number of patients with frequent mouth (37%), throat (34%), nose (28%) dryness and nasal stuffiness (24%). There was no difference in upper airway symptoms before nCPAP treatment between those who continued the treatment after 1 year and those who terminated the treatment. Conclusions: The most common upper airway symptoms in patients with untreated OSAS seem to be associated with mucosal dryness. These symptoms improved during nCPAP treatment probably due to the change in breathing pattern. The occurrence of upper airway symptoms before nCPAP start did not predict long-term adherence to the treatment.

Smoking and improvement after nasal surgery in snoring men.

Background The aim of this study was to compare subgroups of smokers and nonsmokers undergoing nasal surgery and to evaluate improvement of nasal stuffiness, snoring, and symptoms related to sleep-disordered breathing after nasal surgery. Methods A cross-sectional prospective study was performed. The study population included 40 consecutive snoring men scheduled for surgical treatment of nasal obstruction. The patients completed nasal and sleep questionnaires, an Epworth sleepiness scale, and a visual analog scale of snoring intensity. They underwent polysomnography, anterior rhinomanometry, acoustic rhinometry, and cephalometric analysis. Results The smokers were younger, they snored longer and louder, and they had higher nasal resistance with decongestion and longer soft palates than the nonsmokers. Nasal stuffiness improved well after surgery, but a decrease of nasal resistance was not related to improvement of subjective snoring. Conclusion Smoking was associated with increased snoring, nasal obstruction, and pharyngeal soft tissue volume. Expectations of patients may influence subjective assessment of snoring after nasal surgery.

Parental smoking, nasal resistance and rhinitis in children

Aim:  To determine whether parent‐reported perennial rhinitis or objectively measured nasal resistance is more common in children from smoking families. To assess tonsillar size, nasopharyngeal airway and upper airway surgery frequency in children with smoking and non‐smoking parents.

Esophageal pressure monitoring in detection of sleep-disordered breathing.

Objective The aim was to study the value of esophageal pressure monitoring combined with limited polygraphic recording (oxygen saturation, respiratory and leg movements, airflow, body position, and snoring sound) in diagnosis of sleep‐disordered breathing.

Symptoms at presentation in children with sleep-related disorders

OBJECTIVE To assess the link between sleep-disordered breathing and cognitive function in children. To identify correlations among polysomnography, upper respiratory infections, or cephalometric as well as rhinometric measures. METHODS This study is based on a questionnaire survey of snoring in a population cohort of 2100 children. Altogether, 44 snorers and 51 non-snorers participated in this community based clinical study. All children underwent polysomnography, cephalometry and rhinometric measurements. In addition, a standardized test of intelligence (WPPSI-R), a neuropsychological test battery (NEPSY) and a parental questionnaire on behavioral symptoms (CBCL) were administered. RESULTS Frequently snoring children scored lower in Language functions (Comprehension of Instructions, P=0.01; Speeded naming, P=0.007) and had more internalizing problems, P=0.04 than did the non-snoring group. However, the polysomnography parameters of these snoring children revealed no major sleep-related breathing disorder. OAHI, mean lowest SpO(2) and respiratory effort correlated with Auditory Attention (P<0.05), Body Part Naming (P<0.05) and Memory (P<0.05). Tonsillar size correlated with OAHI (P<0.01) and respiratory effort (P=0.01) and respiratory airflow (P<0.01). In cephalometry, the minimal distance from velum to posterior wall was shorter showing the shorter length among snorers than non-snorers, 5.5mm vs. 6.6mm, respectively (P<0.05). Recurrent upper respirataory infections (URIs) were common among the snoring than non-snoring children (P=0.01). Children suffering recurrent URIs have more somatic complaints than children without recurrent URIs (P<0.01). CONCLUSIONS Snoring children with apparently normal and/or no obstructive apnea, hypopnea, or marked SpO(2) desaturations appear to suffer impairment in neurocognitive and behavioral functions compared to non-snoring children. These snoring children did not reveal any major abnormalities of polysomnographic parameters, such as sleep-related breathing disorder, including partial upper airway obstruction. Polysomnographic parameters also correlated poorly with neurocognitive test results in these snoring children. The correlations between polysomnography and upper respiratory infections, with cephalometric and rhinometric measures, were also poor.

The Effect of Nasal Obstruction on Outcomes of Uvulopalatopharyngoplasty

Nasal obstruction is considered an aggravating factor in some patients with obstructive sleep disorders. There are no previous reports about the effect of nasal obstruction on outcomes of uvulopalatopharyngoplasty (UPPP). The symptoms of 100 patients treated by UPPP in our hospital were analysed. Forty-nine of them were diagnosed as having obstructive sleep apnea syndrome (OSAS), as ODI 4 was > 5. Nasal obstruction was measured using preoperative anterior active rhinomanometry. The degree of snoring and daytime sleepiness was evaluated using a questionnaire preoperatively and again 6-12 months after the operation. Snoring was relieved in 96% of all patients. Excessive daytime sleepiness improved in 87%, which is also consistent with earlier good results. There was no significant difference in improvement of these symptoms in nonapneic snorers and in patients with OSAS. In the group of 10 patients with highest nasal airway resistance snoring was relieved in only 78% as compared with 98% in the others (p < 0.05). Also excessive daytime sleepiness was better relieved in the group of patent nasal airway, but this difference was not statistically significant. Nasal obstruction can effect the outcome of UPPP. Treatment of nasal obstruction should be considered in chronic snoring if snoring and excessive daytime sleepiness persist after UPPP.