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Survey on joint hypermobility in university students aged 18–25 years old

Advances in Rheumatology volume 58, Article number: 3 (2018) Cite this article

Abstract

Background

Joint hypermobility is defined as a wide range of movements beyond the physiological limits, it has been recognized in healthy people, gymnasts, acrobats, and carriers of genetic affections of connective tissue. A survey among young adults was conducted to describe the frequency of joint hypermobility, estimating its impact on function and quality of life.

Methods

Volunteer university students aged 18 to 25 years old who answered a valid 5-item questionnaire about hypermobility, a physical activity questionnaire, and the Brazilian version of the Medical Outcome Survey Short Form 36 (SF-36) were included. Hypermobility was also assessed by a guided self-examination, with Beighton’s criteria being scored and scores greater than or equal to 4 or less than 4 being discriminated.

Results

A total of 388 subjects were included, of which 299 were women (77.06%) and 89 were men (22.94%); the median age was 23 years old. Generalized joint hypermobility (Beighton score ≥ 4) was observed in 104 individuals (26.8%). Localized hypermobility (Beighton score 1–3) was observed in 135 (34.79%) individuals, where the hypermobility of the 5th finger was the most frequent in 165 (57.47%) individuals, followed by hypermobility of the thumb in 126 (32.56%) individuals, hypermobility of the elbows and knees each in 72 (18.6%) individuals, and hypermobility of the spine in 69 (17.79%) individuals. The descriptive observation of physical activity indicated regular practice. The correlation coefficients between the SF-36 domains and hypermobility scores were very low and statistical comparison not significant.

Conclusion

In this population of youngsters, predominantly women, localized hypermobility was more frequent than generalized hypermobility; however, with low impact on health domains and quality of life scores, estimated in each domain of the SF-36, the physical and mental component scores, and the time dedicated to physical activity.

Background

Hypermobility is defined as the wider range of movements beyond the limits considered physiological. It has been recognized as a phenomenon frequently observed in healthy people, acrobats, gymnasts, and ballerinas [1,2,3,4,5]. Hypermobility is also part of the syndromic presentation of certain genetic diseases, [6] such as Ehler-Danlos Syndrome, Marfan Syndrome, Down Syndrome, Osteogenesis imperfecta, and Stickler Syndrome, among others.

The concept of benign joint hypermobility, as a rheumatic condition leading to chronic musculoskeletal symptoms, emerged in the 1970s with several case series and population studies identifying the association with chronic musculoskeletal pain [7, 8] and, more recently, with dysautonomia and gastrointestinal dysmotility [7,8,9].

The incidence and prevalence of hypermobility vary greatly among populations, with marked differences according to age, gender, ethnicity, physical activity, or sports and athletic abilities. Approximately 25–50% of children younger than 10 years old have some degree of hypermobility [10,11,12,13,14,15,16,17]. There is a higher prevalence in populations of Asian origin, followed by populations of African and European origins [10, 12, 14, 15, 17,18,19,20,21,22,23,24,25,26]. However, comparisons among different populations have been hampered by the use of different criteria and methodologies for the evaluation of hypermobility.

Most clinicians recognize joint hypermobility in routine practice and by the use of the range of motion scale assessment proposed by Beighton [20]. The presence or absence of hypermobility in the joints is categorized, signaling the flexibility of five areas of the body with extension beyond the physiological limits. The maneuvers that make up the Beighton scale represented in Fig. 1 are 1) extension of 5th metacarpal phalangeal joint by placing the 5th finger parallel to the forearm, 2) extension of the thumb touching the flexor side of the forearm, 3) extension greater than 10o beyond the limit of 180o of the elbow, 4) extension greater than 10o beyond the limit of 180o in the knee, and 5) flexion and elongation of the spine by placing the hands flat on the floor with the knees in maximum extension. These maneuvers are individually scored on each side of the body and spine, to a total of 9 points. Scores greater than or equal to 4 are classified as generalized joint hypermobility, and scores 1–3 are classified as localized joint hypermobility [1, 4, 27].

Fig. 1
figure 1

Percentage frequencies of unilateral or bilateral signs of hypermobility identified through 5 maneuvers in the Beighton scale: 1) extension of the 5th metacarpal phalangeal joint by placing the 5th finger parallel to the forearm, 2) extension of the thumb touching the flexor side of the forearm, 3) extension greater than 10o beyond the limit of 180o of the elbow, 4) extension greater than 10o beyond the limit of 180o in the knee, and 5) flexion and elongation of the spine by placing the hands flat on the floor with knees in maximum extension

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Physiotherapists are trained to identify reduced range of motion and its clinical repercussions, associating it with several conditions of inflammatory origin. Greater ranges of movement are interpreted as variations of the normality of individual characteristics. Intervention with physical exercises still does not result in consistent evidence because a systematic review of intervention with exercises for those with functional repercussions was not conclusive regarding the effectiveness of the intervention with exercises or physical activity on hypermobility and its functional repercussions [28].

A wide spectrum of extra-articular clinical manifestations has been progressively recognized in association with musculoskeletal symptoms [29], such as predisposition to ecchymosis, poor wound healing, early onset of osteoarthritis, valvulopathy, osteoporosis, vesicoureteral reflux, inguinal hernia, and changes in intestinal motility [5, 6, 26, 30,31,32,33]. There are also other manifestations, such as fatigue, anxiety, and depression, negatively affecting social function and well-being [34].

The main musculoskeletal manifestation is chronic and generalized pain [7, 9, 17, 26, 35]. Proprioceptive functions may also be adversely affected, possibly due to damage to mechanical connective tissue receptors. Failure to recognize extreme joint range of movement can lead to joint instability and traumas to repetitive stress [36,37,38]. Decreased muscle strength can occur in children with limb pain and joint hypermobility [39]. There is evidence that hypermobility syndrome is a multisystemic manifestation, incorporating three main components: chronic pain, autonomic dysfunction, and dysfunction of gastrointestinal motility [6, 8, 26, 30, 32, 39, 40].

There have been few population studies on the impact of hypermobility among young adults. The frequencies of generalized and localized hypermobility have been widely studied in several populations, including the Brazilian pediatric population of pre-schoolers and schoolchildren [10, 14, 21]; however, studies on adolescents and young adults are scarce in the global literature [11, 16] and have not been referred to our population.

Objective

To investigate the frequency of joint hypermobility among university students 18 to 25 years old through survey and self-examination, estimating its functional impact and its impact on quality of life through the Medical Outcome Survey Short Form 36 (SF-36) questionnaire.

Methods

Volunteers between 18 and 25 years of age from medical and physiotherapy courses were invited to participate in this study after the work team provided explanations about the study.

The project obtained institutional ethics committee approval (CEP-457/2010) and agreement from the course councils; the subjects who agreed were included in the study by signing the Terms of Free and Informed Consent. The research was conducted in accordance with the Helsinki Declaration for research on humans beings.

Participants completed the self-administered questionnaires on hypermobility, including a valid five-item questionnaire adapted by Moraes et al. [41] and a survey on multisystemic associations of hypermobility syndrome [26]. The Brazilian version of the SF-36 [42] was completed by the subjects, and their records were identified by alpha-numerical code without personal identification. The self-examination was observed and recorded in case report forms by three trained observers, and the data were transferred to analysis worksheets.

The SF-36 is a widely used measure of health-related quality of life. The purpose of this questionnaire is to detect clinically and socially relevant differences in the health conditions of both the general population and individuals affected by certain diseases, along with any changes in health status over time through a small number of statistically efficient dimensions. The SF-36 consists of 36 items in 8 domains: Physical Functioning (CF), Role-Physical (RF), Bodily Pain (BP), General Health (GH), Vitality (VT), Social Functioning (SF), Role-Emotional (RE), and Mental health (MH), resulting in two summary components, the Physical Component (PCo) and the Mental Component (MCo). The score ranges from 0 to 100 points, where 0 represents the worst state of health and 100 the best state of health in the last 4 weeks.

A single evaluation was performed; there was no gender selection, and participation was voluntary, with consecutive inclusion of participants until reaching the sample size estimated by means of statistical calculation. The specific musculoskeletal examination, which includes hypermobility maneuvers, was instructed and conducted according to the scheme outlined in Fig. 1.

The sample size was calculated considering the prevalence of hypermobility in this specific age group as unknown (p = 0.50), with a reliability of 95% and a margin of error of 5%. The minimum size calculated for the sample was 385 subjects, and the maximum was 400 subjects.

The descriptive analysis of the frequency of signs and symptoms of the joint hypermobility survey and of the Beighton scale score was performed. Qualitative variables were described by absolute and percentage frequencies. Quantitative variables were described by medians and variation ranges (minimum-maximum) or means and standard deviations when appropriate. SF-36 scores on valid questionnaires (< 5% lost data) were calculated using SAS for Windows software version 9.3.

The frequency of hypermobility was scored individually by determining the frequency of joints scored and compared by gender. The comparison of hypermobility areas in men and women was performed using Student’s t test (two categories). The categorization of generalized hypermobility by means of the limit of 4 or more joints scored using the Beighton criteria was also estimated according to the frequencies and possible associations explored.

The association tests between the hypermobility parameters and the SF-36 domain scores with the respective summary scores were performed using the Pearson Correlation Test. The association is represented by the Pearson r, and the significance is expressed by the values of p < 0.05. Correlations < 0.4 were considered weak or with no association, those between 0.4 and 0.7 were considered moderate, and those > 0.7 were considered strong.

Results

The participants of the research were volunteers who agreed to participate in the study through signing the Terms of Informed Consent. There was no refusal to participate. The sample consisted of 388 subjects, of which 28 were from the Medicine course and 360 were from the Physiotherapy course. The evaluation period was from February 2013 to April 2014.

A total of 388 subjects were recruited, including 299 women (77%) and 89 men (23%), with a minimum age of 18 years and a maximum age of 25 years (median 23), with the following anthropometric characteristics: mean weight (64.5 ± 15.7), median weight 60 kg, mean height (1.66 ± 0.09), and median height 1.65 m. The mean body mass index (BMI) was (23 ± 4), and the median BMI was 22.

The self-evaluation of physical activity, by means of estimating the number of hours per week of practice of leisure activities, sports, and competitions, was compiled. The descriptive analysis was as follows: 165 declared a mean leisure activity practice time of (1.7 ± 2.9) hours/week; 124 subjects declared a mean sports practice time of (1.6 ± 3.2) hours/week, and 23 subjects declared a mean competition practice time of (0.2 ± 1.2) hours/week.

The responses to the 5-item hypermobility questionnaire, estimating the presence or absence of joint hypermobility, are presented in Table 1. Among the most scored items, the highest was the spine (48.2%).

Table 1 Frequencies of responses on hypermobility, described in a 5-item questionnaire for joint hypermobility [41]
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The survey on musculoskeletal and extra-articular or systemic complaints associated with joint hypermobility and their respective frequencies is presented in Table 2. The most frequently reported problem was low back pain, present in 176 (45.4%) of the subjects.

Table 2 Frequencies of valid responses in the inquiry of signs and symptoms, musculoskeletal and systemic, related to joint hypermobility
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The classification of hypermobility was established using the instructed self-examination recorded by three trained observers, using the criteria of Beighton [20], with a limit of 4 or more joints (≥ 4) to determine generalized hypermobility and a 3-joint limit (≥ 1 and ≤ 3) for localized hypermobility [43].

Generalized joint hypermobility was observed in 104 (26.8%) individuals. The frequency of generalized joint hypermobility in women was 27.8%, and that of the male population was 23.6%. The locations of the hypermobility signs and their respective frequencies and distributions are shown in Fig. 1, with the paired signs being independently and bilaterally scored in the majority.

The 5th finger hypermobility sign was the most frequent, being described in 165 (42.52%) individuals, followed by the thumb in 126 (32.56%) individuals, elbows and knees in 72 subjects each (18.6%), and spine in 69 (17.79%) individuals. There were no statistically significant differences in gender for any of the signs (Table 3).

Table 3 Comparison of the frequencies of joint hypermobility signs scored in the Beighton Scale according to gender (Student’s t-test)
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In the SF-36 questionnaire, the results were comparable with the normative data in adults of the Brazilian population. No significant differences were observed in the results of each domain and in the physical and mental indices among those with generalized hypermobility, localized hypermobility, or absence of hypermobility (Table 4).

Table 4 Comparison of the SF-36 scores in the total sample of volunteers, without hypermobility (Beighton score = 0) or with localized hypermobility (1–3) and generalized hypermobility (≥ 4)
Full size table

The following correlations were found between each SF-36 domain and the generalized hypermobility condition (score ≥ 4): Vitality (VT) r = − 0.05284, p = 0.2991; Mental Health (MH) r = − 0.10007, p = 0.05; Physical Functioning (PF) r = − 0.04907, p = 0.3350; Role-Physical (RP) r = − 0.03178, p = 0.5325; Bodily Pain r = 0.07304, p = 0.1510; General Health (GH) r = − 0.11050, p = 0.03; Role-Emotional (RE) r = − 0.02224, p = 0.6623; Social Functioning (SF) r = − 0.05410, p = 0.2878; Physical Component (PCo) r = − 0.06839, p = 0.1789; and Mental Component (MCo) r = − 0.02491, p = 0.6248. All correlations were weak (0.1 to 0.3), although they were significant for Mental Health and General Health. There was no association between the SF-36 score and hypermobility, indicating a minimal impact on the health, physical, and psychosocial aspects of volunteers.

Discussion

The primary objective was to estimate the frequency of hypermobility among young university students and the possible repercussions on their health condition as evaluated using objective methods. Women were predominantly included in an unselected population, as students of both genders were invited. We found a frequency of 27% generalized joint hypermobility and an interesting result of 35% localized hypermobility. Localized signs of hypermobility predominated on the hands and secondarily on the elbows, knees, and spine. The selection of volunteers in medical and physiotherapy schools was aimed at achieving a homogeneous sample of the healthy population with regular physical activity.

The frequency of generalized hypermobility found in our study in young people was similar to that of English adolescents reported by Clinch et al. 2011 [16] using the same threshold of more than 4 points in the Beighton scale found in the cohort up to 14 years old, with proportions of 27.5% in girls and 10.6% in boys. Accordingly, 45% of the girls had finger hypermobility compared with 29% of boys with finger hypermobility. These authors also did not describe any associations between hypermobility and physical activity, body mass index, or maternal education level.

A recent study among Korean girls and women [44] described the presence of generalized hypermobility in 50% of respondents, 59% in girls and 36.5% in adult women, with the number of signs inversely proportional to age. Significant differences of localized hypermobility in the thumb and 5th finger were found in both groups. The lower frequency of hypermobility according to age occurred symmetrically on both thumbs but it was more pronounced in the fifth finger of the dominant hand, more often on the right hand.

Based on anthropometric data including weight, height, and body mass index, overweight was occasional, and physical activity was relatively regular, with a higher proportion of patients with localized hypermobility, especially in the hands. Population studies are described in the pediatric literature, but data on their frequency, effects, and consequences in the young adult population have been infrequent. Musculoskeletal pain is a sign often related to hypermobility and obesity; sedentary lifestyle may play a relevant role [45, 46], as there is a two-fold increased risk in adolescents with hypermobility.

Although the Bodily Pain domain had minimum impact or correlation with hypermobility in the SF-36 investigation, the frequency of musculoskeletal pain was relevant, mainly due to the proportions of low back pain, frequent cramps, arthralgia, and sprains. Long-term studies on sequelae, including the risk of osteoarthritis, are still inconclusive. Conditions such as tendinitis, bursitis, fasciitis, and fibromyalgia correspond to 25% of referrals to rheumatologists. The association with generalized and localized joint hypermobility, repetitive strain activities, and pain in areas of localized hypermobility [47], has been explored in professional artistic activities such as ballet, gymnastics, and acrobatics [48, 49], predisposing to pain and injury due to associated mechanical trauma,.

In a Brazilian study, the prevalence of hypermobility in academic ballet activity was 58%, with a higher frequency among teachers compared with students [49]. It is also interesting to observe the performance of flute players, who have particularly greater range of motion in the hands, and even finger hypermobility, presenting more accurate proprioception through training, which is an ideal model to study the interaction between localized flexibility and joint proprioception [50].

Questions about the practice of music or dance activities were not part of our inquiry; we questioned only the number of hours practicing leisure physical activities and sports activities. The options for the Beighton criteria may have some criticism due to variability and divergence in the cutoff scores. The higher scores, such as ≥4, ≥ 5, ≥ 6, and ≥ 7 hipermobile joints could also be considered; however, the score ≥ 4 was the most widely reported in the literature as the most frequent cutoff point [1, 2, 11,12,13, 17, 20, 21, 39, 49, 50].

For the diagnosis of generalized joint hypermobility in children and adolescents, at least 5 of the 9 criteria on the Beighton scale are recommended; the difference between the conditions of generalized joint hypermobility and joint hypermobility syndrome is the presence of symptoms. Associated symptoms including predominant musculoskeletal conditions, such as joint pain and instability [26], are more frequently observed in adults and are possibly related to mechanical impact or repeated strain activity.

However, dysfunctional gastrointestinal manifestations [32, 40], such as constipation, vesicoureteral reflux [3], or inguinal hernia [31], are more frequently described in pediatric age. Our survey was limited in the approach of other systems involved. Among the systemic manifestations, poor wounds healing, which had a low frequency of responses, was questioned. In the recall survey about pain in the lumbar spine region and arthralgia, these complaints were the most frequent, involving 319 reports in total, but without repercussions on quality of life and health status. Our data are consistent with Ruperto et al. 2004 [25], who used the CHQ-PF 50 questionnaire among healthy schoolchildren with hypermobility and also did not identify repercussions in their physical and psychosocial components.

Musculoskeletal pain can be triggered by physical activity in the absence of adequate physical conditioning, intense physical exercise, an accident, or a traumatic event or may develop without any apparent reason; its association with hypermobility mmay be of mere chance. There are also associations of chronic pain with fatigue, dysautonomia, and negative impacts on quality of life scores due to anxiety and depression [28], which require intervention. However, these associations have been reported in samples of symptomatic hypermobile individuals who seek clinical treatment, comprising approximately 1% of men and 5% of women.

More comprehensive population studies including healthy individuals are still needed to estimate the magnitude of the problem and the generalization of our results.

Conclusion

In conclusion this young population sample with a predominance of women, localized hypermobility was more frequent than generalized hypermobility; however, there was minimum impact on either health or quality of life.

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Acknowledgments

Darcisio Hortelan Antonio attended the Public Health Graduate Course, Sao Paulo State University (Universidade Estadual Paulista - UNESP), accredited by the Brazilian Federal Agency for the Support and Evaluation of Graduate Education (CAPES). Claudia Saad Magalhães MD, graduate mentor was funded by CNPq Scholarship (301644-2010, 301479/2015). The students Fabricio Lopes Stafussi, Juliana de Freitas, and Susan Nawaly collaborated in the data collection and Prof. José Eduardo Corrente (UNESP) perfomed the statistical analysis.

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The original data basis that generated the work is filed by the first Author Darcisio Hortelan Antonio.

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  1. Pediatrics Department, Botucatu Medical School, Graduate Program in Public Health of UNESP, Sao Paulo State University UNESP, Avenida Prof. Mario Rubens Guimarães Montenegro SN, Campus da Unesp, Rubião Junior, CEP, Botucatu, SP, 18618-687, Brazil

    Darcisio Hortelan Antonio & Claudia Saad Magalhaes

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  1. Darcisio Hortelan Antonio
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  2. Claudia Saad Magalhaes
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Both authors contributed equally to the paper development. It was developed as master’s thesis under the Public Health Graduate Programme at UNESP.

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Correspondence to Claudia Saad Magalhaes.

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The project obtained institutional ethics committee approval (CEP-457/2010) and agreement from the undergraduate course councils of the Medical School and Physiotherapy School; the subjects who agreed were included in the study by signing the Terms of Free and Informed Consent. The research was conducted in accordance with the Helsinki Declaration for research on humans beings.

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Antonio, D.H., Magalhaes, C.S. Survey on joint hypermobility in university students aged 18–25 years old. Adv Rheumatol 58, 3 (2018). https://doi.org/10.1186/s42358-018-0008-x

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Keywords

Advances in Rheumatology

ISSN: 2523-3106