AbstractObjectivesTo explore how respiratory health and sleep problems affect mental health in children and adolescents with neuromuscular disorders (NMDs).
MethodsA qualitative descriptive study was carried out with content analysis of in-depth interviews conducted with children with NMDs and their parents. Data were collected during semi-structured interviews with children with NMDs and their parents. A total of 14 families were recruited (17 parents and 7 children and adolescents with NMD aged 5–17 years). Each interview was conducted with 1–3 family member(s).
ResultsEngagement in community activities, meaningful relationships, feeling well, and achieving independence each contributed positively to children’s mental health. Additional challenges to mental health during periods of poor respiratory and/or sleep health included: 1) challenges to behavioral regulation, 2) changes to mood, and 3) challenges to thinking. Parents and children reported nurturing and coping self-management strategies when their physical and mental health were dually challenged in addition to medical management strategies such as non-invasive ventilation (NIV).
ConclusionsThis study supports the notion that changes in mental health may indicate poor physical health in children with NMDs. Treating respiratory and sleep problems, such as by early NIV implementation, may improve the mental health of children with NMDs and thus support their overall wellbeing and health outcomes.
INTRODUCTIONNeuromuscular disorders (NMDs) are rare conditions characterized by muscle weakness, many of which involve progressive loss of functional abilities [1]. NMDs include Duchenne muscular dystrophy (DMD), spinal muscular atrophy, and other rare disorders such as congenital myopathy and muscular dystrophy [2]. Muscle weakness [3,4] is associated with reduced mobility, pain, and respiratory complications such as hypoventilation, respiratory failure, and sleep dysfunction [4,5]. Medical treatments and rehabilitation strategies focus on delaying functional decline and improving quality of life (QOL) [6] as there are currently no known cures for these disorders [1,2,7].
Individuals with NMD are at risk of frequent respiratory infections, greater healthcare utilization, and increased hospitalization [5,8-10]. Sleep apnea and sleep-related hypoventilation often co-exist in this patient population [8,10]. Specifically, in boys with DMD aged 5–18 years, the prevalence of obstructive sleep apnea, central sleep apnea, and hypoventilation were 64%, 34%, and 17%, respectively [11]. Symptoms of sleepdisordered breathing associated with NMDs include daytime fatigue, morning headaches, snoring, restless sleep, difficulty in rousing, mood changes, and difficulty in focusing [8,10]. Sleepdisordered breathing can be treated with non-invasive ventilation (NIV) [9]. Clinical surveillance of respiratory dysfunction is important for effectively providing respiratory support [1,2,7].
Mental health encompasses how a person operates in their daily lives, including managing everyday stress [12]. Parent-reported data suggest that children with NMDs are at risk of developing difficulties with behavior, communication, and social interaction, and such challenges are often associated with other neurodevelopmental impairments such as intellectual disabilities or autism spectrum disorder [13]. A higher prevalence of internalizing (anxiety and depression) and externalizing (aggression and hyperactivity) problems has been observed in boys with DMD than in healthy populations [14]. Data on these mental health trends have been acquired by parent reporting [13,14], child reporting [13], or clinical evaluations [14,15].
Physical and mental health have been found to be interrelated [16]. For example, improved sleep health has been associated with better mental health and cognition in the general population [17,18]. Fatigue in adults with NMDs is associated with lower mood [19]. Similarly, children with asthma are more likely to exhibit poor mental health than their healthy counterparts [16], and poor respiratory health in patients with NMDs is believed to have implications for their mental health. Beyond these data, the lived experiences and impacts of fluctuating physical health on mental health have not yet been explored in children and adolescents with NMDs. This study aimed to explore how episodic respiratory and sleep problems affect mental health in children and adolescents with NMDs from the perspectives of parent caregivers and children.
METHODSThis was a descriptive, qualitative study that aimed to gain insights into the lived experiences of children and adolescents with NMD related to respiratory health, sleep, and mental health. Ethical approval was granted by the Child and Adolescent Health Services Human Research Ethics Committee (RGS4295) and Curtin University Human Research Ethics Committee (approval number: HRE2021-0123). Written informed consent was obtained from participating parents and mature minors.
Participants and recruitmentPurposive sampling across a range of characteristics was employed due to the lack of related literature in the field. We aimed to capture the variation in experiences across different ages (5–17 years), diagnoses, and mobility. Participants were recruited via the Muscular Dystrophy Western Australia (MDWA), Perth Children’s Hospital (PCH), and Telethon Kids Institute (TKI). The study was advertised through TKI networks in the clinic at the PCH and through MDWA networks.
ProceduresPrior to commencement, the study design and interview schedule were presented to a Consumer Reference Group comprising parents of children with NMDs to obtain their input. The interview schedule (Supplementary Material in the online-only Data Supplement) was semi-structured with open-ended questions about current health, wellbeing, and episodes of poor respiratory and sleep health followed by probing questions. Interviews were conducted once with each family member by phone or videoconferencing. Training was provided by the senior author (JD) to the primary researcher (MH, a physiotherapist with special interest in disability). All interviews were audio-recorded and transcribed verbatim. Parent caregivers and children were offered the option to be interviewed separately or together depending on their preferences. Preliminary scoping suggested that children and adolescents prefer discussions at the family level.
Data management and analysisThe final interview transcripts were imported to NVivo software (QSR International Pty Ltd., Burlington, MA, USA) and analyzed using content analysis to generate a framework of domains considering relevant findings in the literature. The researchers had prior knowledge in this field, and this study was not oriented toward developing a theory [20]. The primary researcher read the transcripts multiple times and coded the data inductively into categories. Quotes from parent caregivers, children, and adolescents were coded together within categories. The categories were reviewed by the research team to achieve consensus. The data were estimated to be thematically saturated when no new categories or elements were identified within the categories.
Rigor of collected dataStrategies were implemented to ensure the rigor of data collection and address common criteria, including credibility, dependability, confirmability, and transferability [21]. For credibility, the data were peer-debriefed and member-checked with the Consumer Reference Group to discuss the findings. An audit trail using NVivo-12 ensured dependability and confirmability. Thick descriptions in the research allowed for the transferability of conclusions drawn from this sample of children with NMDs to other children with NMDs. To limit the influence of researcher bias on interpretation, audiotapes, transcripts, and coding were examined at length by the full research team.
RESULTSFrom a total of 17 families, members from 14 families were recruited, while 3 families declined to participate. Parents and children were offered the opportunity to participate in interviews together or separately; however, no child chose to participate in individual interviews. Interviews were conducted with 14 families comprising 17 parents (14 mothers and 3 fathers) and 7 children/adolescents. As all participants spoke English, interviews were conducted in English. Most children and adolescents included in this study were diagnosed with DMD. The majority of the patients were boys, non-ambulant, and receiving nocturnal respiratory support. The median age of child participants was 14 (range: 7–17) years. Most children reported pain on their usual days. Participant characteristics are presented in Table 1. Families were interviewed between January and June 2021. Interviews lasted a median (range) of 73 min (51–156 min).
Participants described how engagement in community activities, fostering meaningful relationships, and feeling independent contributed to their child’s mental health. Periods of poor respiratory health and difficulties with sleep (i.e., lower respiratory tract infections, poor sleep quality, and snoring) additionally contributed to the child’s mental health in three categories: 1) difficulties regulating behaviors, 2) changes to mood, and 3) challenges to thinking (Fig. 1). Parents and children reported nurturing and self-management coping strategies in addition to medical management such as NIV, which improved sleep and supported the child’s ability to manage everyday challenges. Sample quotes illustrating these categories are presented in Tables 2–4.
Difficulties regulating behavior
Table 2 presents elements and sample quotes for this category.
Cranky and argumentativeMany parents observed their children becoming cranky and more argumentative during episodes of poor respiratory health or sleep. For example, children were described as lacking patience and being resistant to completing household chores, with a tendency to react intensely rather than regulating their responses: “So his brother might make a comment that normally wouldn’t bother him because he would just be able to ignore it, but he’ll get quite cranky and fire off a response.” This argumentative disposition contrasted with the even-tempered behaviors observed when the child was well.
ImpulsivityAfter episodes of poor respiratory health or impaired sleep, parents described occasions where their child would throw objects or knock over equipment. These behaviors were not routinely observed when the child was well. As one parent described: “So, on a day where there’s been sleep, that behavior may happen just once within the day, but if he’s had a poor night’s sleep, we’ll see those behaviors four or five times in a day.”
Obsessive behaviorsSome children included in this study have been diagnosed with obsessive–compulsive disorder (OCD) or autism spectrum disorder. Parents observed an increase in obsessive or repetitive behaviors during episodes of poor respiratory health or sleep. Examples include placing items in order and panicking when different foods are mixed on their dinner plate. One parent commented: “So he has significant OCD and I think what happens is that when he becomes more fatigued and more tired, whether that’s due to respiratory or what, his behaviors escalate.”
Changes to mood
Table 3 presents elements and sample quotes for this category.
Anxiety and worryTiredness commonly results in anxiety in children and adolescents. For children with underlying anxiety, anxiety escalates with poor respiratory health and sleep. One parent commented that “the anxiety is probably the stem of a lot of the problems, it’s there most of the time, but it escalates very quickly when there’s tiredness.”
Comfort seekingMany parents commented on their children seeking extra comfort and affection during episodes of poor respiratory health and sleep disturbances. This included wanting to cuddle more with parents, seeking favorite foods and warm drinks, and snuggling with blankets and soft toys. These behaviors were observed less frequently when children were in good health and tended to be more independent.
IrritabilityEpisodes of poor health and fatigue were considered to induce increased irritability. Some behaviors were described as angry, blunt, snappy, frustrated, and overly sensitive. Other children became irritated with everyday tasks because these tasks were more effortful, as parent commented: “[name]’s form of irritability would be that he gets a bit snappy, and short with people … he does things with a huff.”
Somberness and withdrawalSome children were described as quiet, drained, having a low mood, and isolating themselves when unwell. One parent stated that “he will just look very dull, and very, very tired… and just not being himself, he won’t talk much. You can tell that something is coming.” These quiet and somber moods contrasted with vibrant and playful attitudes observed when children were well.
Lack of enthusiasm and motivationChildren were reluctant to engage in their daily routine. One parent commented on their child’s lack of enthusiasm and motivation before starting NIV, where the child’s quality of sleep was poor: “she was reluctant to get moving, reluctant to do activities”. The parents noted improvement in engagement in everyday activities after commencing NIV, which was attributed to better sleep quality. When fatigued or unwell, the children were less likely to extend themselves academically, as one child articulated: “…not really motivated to do anything. Like if there’s like extension work offered and if I’ve slept well and I’ve got energy, I will do that. But if I haven’t slept well, I just go back to doing the bare minimum. I just won’t extend myself.”
Challenges to thinking
Table 4 presents elements and sample quotes for this category.
Attention to tasks and concentrationParticipants commented that focus, concentration, and following instructions improved following a good night’s sleep. Many parents noted improvements in their children’s attention and concentration after using NIV. One parent described the following comparison: “Before he started [NIV], he would just go in moments of being in a daze and not hearing what was going on around him … so he’s clearer and can think better with the NIV, a good night’s sleep works miracles.”
Capacity to engageChildren’s capacity to engage socially and participate in routine was reduced with poorer health, including lack of initiative to organize themselves for the day (e.g., getting dressed, packing school bags, brushing teeth, etc.). One parent commented that “he would sit on the lounge and not do anything, wait for breakfast to be brought to him.” With good sleep, children typically showed a greater capacity to engage and, hence, more enthusiasm to participate.
IndecisionSome children experienced difficulties in making decisions in relation to episodes of respiratory illness and poor sleep. This indecisiveness was observed over simple lifestyle or routine choices, such as breakfast or beverage preferences. Physical and mental exhaustion due to tiredness or illness made decision-making too effortful for the children, as one parent reported their child saying “I can’t make a decision. Can you just make one for me?”
Nurturing and coping strategiesIn addition to implementing medical treatment, children adopted self-management strategies to address their mental health challenges. These included self-pacing, taking rest days, and following regular routines. To manage anxiety and feelings of sadness, some children practiced mindfulness activities, including relaxation, meditation, positive self-talk, and sensory play. Other children adopted more specific coping strategies, such as rating their anxiety on a scale, counting backward from 100, and listening to audiobooks.
DISCUSSIONChildren and adolescents with NMDs are at risk of poor mental health [13-15,22]. This can be exacerbated in individuals with DMD owing to the regular use of exogenous corticosteroids, which can alter mood, behavior, and sleep [7,23]. Factors such as reduced participation in the community may also play a role [24]. Similar to our findings, children with increased asthma symptoms (wheezing and night waking) have been reported to exhibit more anxiety, hyperactivity, impulsivity, and oppositional behavior [16,25]. Our data are consistent with relationships described between poor sleep and behavioral problems in children with NMDs [8,10] and between fatigue and mood in adults with NMDs [19]. This is the first qualitative study to explore how episodic respiratory illness and sleep dysfunction impact mental health in children and adolescents with NMDs. Our findings expand on previous NMD literature and include observations of more obsessive behaviors and poorer concentration during these episodes.
Sleep-disordered breathing in children and adolescents in the general population causes inattention and poor concentration [17,18,26]. Our findings suggest that sleep dysfunction may significantly impair thinking processes in children and adolescents with NMDs. The reverse was also true in that the participants described improvements in concentration and focus after experiencing good-quality sleep after NIV treatment was initiated. It is important to note that neuroimpairments, such as intellectual disability, can lead to inattention and poor concentration in individuals with DMD [13-15]. Our interviews aimed to identify specific changes that occurred during episodes of poor respiratory health and sleep in DMD and other NMDs. Everyday cognitive tasks for children and adolescents with NMDs were more challenging during these episodes irrespective of pre-existing neurological or cognitive impairments.
Children’s self-management strategies were supported by medical management such as NIV, which is known to delay respiratory decline, reduce respiratory infection [27,28], and improve sleep and QOL [29]. Other factors also contribute to the mental health of children and adolescents with NMDs. For example, strong social networks (friendships and participation) and better family functioning improve resilience and coping in boys with DMD [30]. In our study, participants similarly identified meaningful community engagement, strong familial and peer relationships, and developing their independence as other factors that contributed to their mental health when they were well and unwell. Exploring other factors that affect mental health was not the aim of this study, which focused on respiratory and sleep issues. However, we confirmed that NMD requires complex care for many impairments and difficulties in maintaining good health, everyday functioning, and participation in the community.
Strengths and limitationsOur data were supported by member checking and peer review to avoid misinterpretation of the data. The inclusion of children and adolescents in the interviews increased the authenticity of children’s reported experiences. There was variability in the participant characteristics representing different ages, NMD diagnoses, and respiratory support use, providing some capacity to transfer these findings to similar patient groups. This study could have been strengthened by more child involvement, although our questions were carefully constructed to acknowledge and involve each child as much as possible.
ConclusionsRespiratory, sleep, and mental health are interrelated in children and adolescents with NMD. This information can be applied to the comprehensive evaluation and treatment of NMD [13,22] with the aim of optimizing health, participation, and QOL. Our findings provide useful domains for the clinical evaluation of physical and mental health. Clinicians can recognize changes in mental health that may indicate worsening physical health of the child when they exhibit behaviors that deviate from their baseline. Further evaluations of the relationships between respiratory, sleep, and mental health using quantitative study designs are needed in future studies. Furthermore, we recommend that the effects of respiratory treatments and sleep interventions, such as early NIV implementation, on the mental health of this population are evaluated.
Supplementary MaterialsThe online-only Data Supplement is available with this article at https://doi.org/10.13078/jsm.220026.
NotesData availability
Data for this study were obtained from transcripts of interviews carried out by the research team. Coding trees, but not interview transcripts, are available to researchers from the corresponding author on reasonable request.
Author Contributions
Conceptualization: Jenny Downs. Data curation: Meg Huston, Jenny Downs. Formal analysis: Meg Huston, Jenny Lam, Jenny Downs. Funding acquisition: Andrew Wilson. Investigation: Meg Huston, Jenny Downs. Methodology: Meg Huston, Adelaide L Withers, Jenny Downs. Project administration: Meg Huston, Jenny Lam, Jenny Downs. Supervision: Jenny Downs Writing—original draft: Meg Huston. Writing—review & editing: all authors.
AcknowledgmentsThe authors would like to thank all participating families, parents, children, and adolescents for taking the time to share their experiences and thoughts. The authors thank the Consumer Reference Group for their opinions and advice on the study design, methods, and interpretation of the findings. We also thank Muscular Dystrophy Western Australia for advertising the study through their news forums and connecting to counterpart organizations in Queensland, Victoria, New South Wales, South Australia, and Tasmania.
Table 1.
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