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A clinical study of rheumatological manifestations in patients with type 2 diabetes mellitus.

INTRODUCTION

Diabetes mellitus is a chronic metabolic condition characterised by persistent hyperglycemia resulting from defects in insulin secretion, insulin action or both. It is associated with long-term damage, dysfunction and failure of various organs, especially the eye, kidneys, nerves, blood vessels and skeletal system.

Although the other complications of diabetes mellitus are recognised as the major causes of morbidity and mortality, the musculoskeletal or rheumatological manifestations associated with it may be very debilitating. Many of these complications are treatable with resultant improvement in quality of life and more independence in activities of daily living. Some of the manifestations like adhesive capsulitis of shoulder and diffuse idiopathic skeletal hyperostosis have a close association with diabetes mellitus that they often lead to diagnosis of diabetes in otherwise asymptomatic patients.

MATERIALS AND METHODS

One hundred patients with type 2 diabetes mellitus and fifty cases of age and sex matched non diabetics recruited for study at Father Muller Medical College and Hospital.

One hundred patients with type 2 diabetes mellitus, both inpatients and outpatients at Father Muller Medical College Hospital and 50 non-diabetics were included in the study.

Inclusion Criteria

The criteria for diagnosis of diabetes mellitus laid down by the American Diabetes Association, 2007, with FBS >126mg/dl, PPBS >200mg/dl and symptoms of diabetes plus random blood glucose >200mg/dl is followed. The control group included patients without family history of diabetes mellitus, fasting blood sugar values <126mg/dl and postprandial blood sugar values <200mg/dl.

Exclusion Criteria

* Patients with history of injury or fractures, end stage renal disease, chronic liver disease with rheumatoid arthritis.

PROCEDURE

One hundred patients with type 2 diabetes mellitus, both inpatients and outpatients at Father Muller Medical College Hospital and 50 non-diabetics were included in the study. Demographic characteristics such as age and sex were recorded. Symptoms suggestive of joint involvement such as pain, stiffness, restriction of joint movement and swelling of the joint with the duration of symptoms were documented. General physical examination with vital parameters, anthropometric measurements were recorded. Detailed systemic and musculoskeletal system examination was done and findings are documented and tabulated. Essential investigations were done wherever necessary.

STATISTICAL ANALYSIS

In this cross-sectional study, the prevalence rates were calculated in percent of total cases in each group and wherever applicable, prevalence amongst two groups was subjected to statistical analysis using Fisher's exact test and Chi-square test. The p value of less than 0.05 was considered significant.

REVIEW OF LITERATURE

Diabetes mellitus is a disease characterized by persistent hyperglycemia, having acute and chronic biochemical and anatomical sequelae of multiple systems. (1) Type 2 diabetes mellitus is the most common form, accounting for 85-95% of all cases worldwide. The World Health Organization has projected that the global prevalence will increase from 125 million in 1995 to 300 million by the year 2025. (2) According to the Diabetes Atlas 2006 published by the Indian Diabetes Federation, the number of people with diabetes is expected to be 69.9 million by 2025. Majority of the patients with type 2 diabetes in developing countries are in the 45-64 year age group in contrast to developed countries where the majority of the diabetics are more than 64 years of age. (3) It is more prevalent in the urban population and the main cause for the increase in the incidence is the change in dietary patterns and decreased physical activity. (4)

The metabolic disturbances of diabetes mellitus cause chronic irreversible damage to vital organs and systems. Though the cardiovascular, renal and ocular complications of diabetes are the most severe, there are various rheumatological manifestations which occur more frequently in patients with diabetes mellitus than in the general population. In contrast to various vascular complications of diabetes mellitus, which are life threatening, rheumatological manifestations lead to considerable morbidity. (5)

The rheumatological manifestations associated with diabetes mellitus can be classified under four categories. (6):

Consequence            * Diabetic muscular infarction

of diabetic            * Neuropathic arthropathy
complications

Consequences of        * Diffuse idiopathic skeletal
metabolic              hyperostosis
derangements
inherent to diabetes   * Osteopenia

With                   * Adhesive capsulitis of shoulder
mechanisms             * Dupuytren's disease
with microvascular     * Limited joint mobility syndrome
disease                (Cheiroarthropathy)
                       * Palmar flexor tenosynovitis

Probable               * Carpal tunnel syndrome
association            * Gout
with diabetes          * Osteoarthritis


Diabetes mellitus affects connective tissues in many ways and cause different alterations in periarticular and skeletal system. (7) Changes in the connective tissue of patients with diabetes are probably due to disturbances in the structural macromolecules of the extra cellular matrix. (8)

A study done by Cagliero E. (9) showed prevalence of rheumatological manifestations was greater in diabetic patients (36%) than in patients in the control group (9%) and more common in patients with type 1 diabetes than in those with type 2 diabetes mellitus. A study done showed that >30% of patients with diabetes have some hand or shoulder disease. (10) Study done by Sarkar. (5) showed that of the various rheumatological manifestations adhesive capsulitis, shoulder hand syndrome, diabetic hand syndrome diffuse idiopathic skeletal hyperostosis, Dupuytren's disease and neuroarthropathy are characteristically associated with diabetes mellitus. Other rheumatological conditions such as osteoarthritis of the knee, hip and spine, pseudo gout, osteolysis of forefoot are common in general population, but have an increased prevalence in the diabetic population. Most of the musculoskeletal manifestations seem to be associated with the duration of diabetes mellitus and appear in diabetic patients of younger age than their counter parts in general population. (7,11)

Adhesive Capsulitis of Shoulder

Adhesive capsulitis of shoulder is a common problem manifested by diffuse shoulder pain associated with loss of motion in all directions and little or no evidence of intraarticular disease. (8) Bridgman. (12) identified adhesive capsulitis in 11% of 800 diabetic patients as compared with 2.5% in 600 control patients. In 4.5% of the patients with adhesive capsulitis, both shoulders were involved. In the study done by Mavrikakis. (13) it was found that 31.8% of diabetics had shoulder calcification compared with 10.3% of the control group. The calcific shoulder periarthritis was located in the right shoulder in 44.7%, in the left shoulder in 26.7% and bilaterally in 28.6% of the patients with diabetes. Study done by Pal. (14)

Showed shoulder capsulitis was present in 19% of patients with diabetes mellitus and 5% of normal subjects. In a study by Mavrikakis. (13) of 824 type 2 diabetics & 320 control subjects shoulder capsulitis was observed in 31.8% and 10.3% of subjects respectively. In the study done by Arkkila. (15) also showed significant association between shoulder capsulitis in patients with type 2 diabetes mellitus. Diabetic shoulder capsulitis appears at a younger age, is less painful, respond less well to treatment and usually lasts longer than non-diabetic shoulder capsulitis. (16) High frequency of other hand syndromes, such as limited joint mobility or cheiroarthropathy has been found among diabetic patients with shoulder capsulitis. (17) Study done by Balci N. (18) showed significant association of shoulder adhesive capsulitis with carpal tunnel syndrome, Dupuytren's disease and limited joint mobility syndrome.

Shoulder Hand Syndrome

The association of adhesive capsulitis with pain, swelling, dystrophic skin and vasomotor instability of the hand constitutes the "shoulder hand syndrome." It is a rare but potentially disabling manifestation of diabetes. (19) Doury et al. described these syndromes as consisting of severe pain disproportionate to the findings of the physical examination in association with articular and periarticular swelling. (8) Steinbrocker and Argyros described three stages of this syndrome. First stage lasts for 3-6 months and is characterised by pain, tenderness, swelling and vasomotor changes. The second stage lasts for 3-6 months and is characterised by trophic skin changes and in the final stage there is atrophy of skin and subcutaneous tissue, tendon contractures and progressive osteopenia. Motor abnormalities such as tremors, involuntary movements and muscle spasms have been reported. (20)

Diabetic Cheiroarthropathy

Diabetic cheiroarthropathy is also known as diabetic stiff hand syndrome, diabetic hand syndrome and syndrome of limited joint mobility. It is characterised by thick, tight, waxy skin with limited joint range of motion and sclerosis of tendon sheaths. (21) The possible sites in the tissues leading to impaired mobility include alterations of the structures in the hand such as intrinsic muscle, joint capsule, subcutaneous tissues and alterations of structures extensive to the hand such as long flexor muscles and flexor tendons of forearm. (22)

A study done showed that limited joint mobility was significantly more frequent in the diabetic patients 36 out of 80, than in the controls 7 out of 47. Among patients who had diabetes for >4.5years, 82 of 169 had joint limitation and >50% of these patients had microvascular complications. (23) A study by Michel.24 showed limited joint mobility was noted in l/3rd of diabetics. It co-existed with Dupuytren's disease in 57% of insulin-dependent diabetics. Limited joint mobility is more prevalent in patients with diabetic neuropathy than in those without. (25) Study by Renard E. (26) showed prevalence of various soft tissue hand lesions was higher in both type 1 and type 2 diabetics (33.3 and 26.7%) than in their control population (5.0 and 8.3%).

Dupuytren's Disease

Thickening, shortening, fibrosis and nodule formation of the palmar fascia, resulting in the flexion contracture of the fingers is termed Dupuytren's contracture. In patients with diabetes, ring and middle finger are more commonly affected compared to the fifth finger in patients without diabetes. (27) The pathogenesis of Dupuytren's contracture due to proliferation of modified fibroblasts that resemble smooth muscle cells with subsequent contraction, might subject neighbouring fascial structures to intermittent tension resulting in hypertrophy. Other studies have documented the deposition of increased amounts of type 2 collagen in the palmar aponeurosis. (8) Dupuytren's contracture occurs in more than l/3rd of the patients with diabetes, especially those with longstanding poorly controlled diabetes. (28) Prevalence of Dupuytren's contracture in diabetic patients ranges from 20-63% compared to 13% in the general population. (29)

Carpal Tunnel Syndrome

Carpal tunnel syndrome is characterized by paraesthesia over the median nerve cutaneous distribution, due to compression of median nerve within carpal tunnel. (29) Its specific relation to diabetes is thought to be due to median nerve entrapment caused by diabetes induced connective tissue changes. Tinel's sign and Phalen's test assist in the diagnosis of CTS. CTS is more common in women than men. The prevalence of CTS in diabetic patients increases with the duration of diabetes. (21)

Neuroarthropathy

Neuroarthropathy is a severe destructive form of degenerative arthritis resulting from loss of sensation in the involved joints, called as Charcot's joints or diabetic osteoarthropathy. (21) Diabetes is one of the major causes of Charcot's joints. The foot is most commonly involved followed by ankle and knee. Unilateral painless foot swelling is the most common finding. Radiographically, there are destructive changes of the tars metatarsal and metatarsophalyngeal joints, which include circumscribed osteoporosis, subluxation, osteolysis, fractures and periosteal reactions. (30,31)

Diffuse Idiopathic Skeletal Hyperostosis

Diffuse idiopathic skeletal hyperostosis is also known as ankylosing hyperostosis, characterized by flowing calcification of paraspinal ligaments, commonly affecting thoracic spine followed by the lumbar and cervical spine. (1) A proposed pathogenesis for the occurrence of DISH in patients with diabetes mellitus is the prolonged and high levels of insulin and insulin like growth factors occurring in diabetic patients, which stimulates new bone formation. (30,31) Pain, stiffness, dysphagia and other neurological abnormalities are the main clinical features of DISH. (32) It is more common in males and seen in persons, above the age of 50 years. Study done by Daragon. (33) has shown association of DISH and diabetes mellitus. In the study done by Sencan D. (34) prevalence of DISH was 12% in diabetics as compared to 6.8% in the control group.

A study by Belanger. (35) has shown that the DISH is seen in 13-49% of diabetic patients and 1.6-13% of non-diabetic patients. Approximately, 70% of patients with DISH have manifestations involving foot and ankle. (36) Study done by Vezyroglou. (37) showed higher prevalence of dyslipidemia, diabetes and hyperuricemia in patients with DISH. In the study by Harris et al. (38) diabetes was found in high proportion of cases with DISH. In the study by Julkunen et al. (39) 13% of 510 diabetics had ankylosing spondylosis on X-ray.

Osteoarthritis

Osteoarthritis or degenerative joint disease, commonly involves the large weightbearing joints. The prevalence of osteoarthritis of large and small joints is higher among patients with diabetes. (6) The incidence is more in type 2 diabetics.21 Crispond Heathcoate reported that OA is more common in young and middle aged diabetics. The joint damage starts at a much earlier age and is more severe in diabetics than in control population. Study done by Sarkar. (5) showed osteoarthritis and diabetes have a positive correlation. It was observed in 31.1% of diabetic patients.

Gout

Gout is a disorder characterised by hyperuricemia and arthritis, affects lower extremities. (8) In the study conducted by Sarkar. (5) acute gouty arthritis was seen in only 0.8% cases, although symptomatic hyperuricemia was seen in 3% patients with diabetes mellitus.

Osteopenia

There is controversy regarding occurrence of osteopenia and osteoporosis in patients with diabetes mellitus. A 14% reduction in trabecular bone density and 8% reduction in the cortical bone density has been seen in children with diabetes and a similar reduction is noted in the adults. (8) Study done by Yi-Jen Heung. (40) showed significantly lower bone mineral density in patients with diabetes than in the control group. McNair et al. has reported that bone mineral density was nearly normal at the onset of clinical diabetes and bone mineral content decreased about 10% within 5 year of diabetes. The mechanism responsible for osteopenia may be increased blood flow, secondary sympathetic denervation or poor diabetic control. (31)

Osteolysis of Forefoot

Osteolysis of forefoot is a distinct clinical syndrome that is characterised by patchy or generalised osteoporosis of distal metatarsal and proximal phalanges with variable pain and erythema that has been described in patients with diabetes. (8) Articular surfaces are initially spared but progressive osteolysis can lead to disappearance of the adjacent bone. It should be differentiated from cellulitis and osteomyelitis. (31)

Flexor Tenosynovitis

Flexor tenosynovitis or trigger finger is caused by fibrous tissue proliferation in the tendon sheath leading to limitation of the normal movement of the tendon. (29)

RESULTS

* 32% (32 patients) among diabetics belonged to the age group of 61 to 70 years and in non-diabetics 32% (16 patients) belonged to age group of 41 to 50 years. Mean age of the diabetics was 57.59 [+ or -] 10.44 years and nondiabetics was 52.40 [+ or -] 10.36 years.

* In the 100 diabetics included in the study, 61% were males and 39% were females. Out of 50 non-diabetics, 50% were males and 50% were females.

* Majority of the diabetic population (37%) had 1-5 years of duration of the disease. Mean duration of disease was 7[+ or -] 6.99 years.

* Rheumatological manifestations were seen in 31 patients (31%) with type 2 diabetes mellitus and 8 patients (16%) without diabetes. It is statistically significant with p value of 0.048 calculated using Pearson's Chi square test.

* Among the 31 type 2 diabetics with rheumatological manifestations, the commonest is periarthritis of shoulder accounting for 55% of the cases.

* Among the 31 diabetic patients with manifestations, 16 had frozen shoulder, 6 had osteoarthritis of the knee, 3 had DISH, 3 had carpal tunnel syndrome and 1 had Charcot joint of the ankle. Both osteoarthritis of knee and periarthritis of shoulder were seen in 2 diabetics. Among 8 non-diabetic patients with rheumatological manifestations, 2 had frozen shoulder, 5 had osteoarthritis of the knee, and 1 had carpal tunnel syndrome. None of them were found to have cheiroarthropathy, flexor tenosynovitis and Dupuytren's contracture. A statistically significant association was found for the prevalence of periarthritis among type 2 diabetics and non-diabetics (p value=0.033).

* The prevalence of rheumatological manifestations in the diabetic population is greater in females (43.6%) as compared to males (23%), which is statistically significant (p = 0.03). In case of non-diabetics it is more common in females, but is statistically insignificant (p = 0.123).

* The rheumatological manifestations were more prevalent in 51-60 year age group followed by 61 to 70 year age group among diabetics. In the non-diabetics, it was commonly found in age group of 51 to 60 years.

* The mean value of RA factor was 11.51IU/ml in diabetics with manifestations as compared to 22.41IU/ml in case of non-diabetics. No significant difference is noted in RA factor in diabetics with and without rheumatological manifestations.

DISCUSSION

In the present study, prevalence of rheumatological manifestations was greater in patients with type 2 diabetes mellitus (31%) compared to the non-diabetics (16%). It is consistent with the study done by Caglerio E. (9) in which 36% of the diabetics had rheumatological manifestations as compared to 9% of non-diabetics and study done by Douloumpakas.7 which showed 82.6% of type 2 diabetics had rheumatological manifestations.

Periarthritis of the shoulder was found in 18% of the type 2 diabetics as compared to 6% non-diabetics in the present study. Among the 18 diabetic patients with periarthritis of shoulder, it was found unilaterally in 83.4% and bilaterally in 16.6% of the patients. The bilateral involvement was more frequent in diabetics (16.6%) than in non-diabetics (0%). In our study 8% of the diabetics and 10% of the non-diabetics had osteoarthritis and mainly knee joint was involved. It is inconsistent with the study done by Sarkar RN.5 in which osteoarthritis was found in 31% of the diabetics out of which 85% were type 2 diabetics and usually found to involve the non-weightbearing joints. Increased prevalence was seen in females than males which was consistent with the study done by Sarkar RN.5 Diffuse idiopathic skeletal hyperostosis is seen only in 3% of the type 2 diabetics as compared to 2% of the non-diabetics, which was not consistent with the various studies. (33,35-38) which reported increased prevalence of diffuse idiopathic skeletal hyperostosis in diabetics as compared to non-diabetics.

From various studies we can conclude that adhesive capsulitis, diabetic hand syndrome, Dupuytren's contracture and DISH are more prevalent in diabetics than non-diabetics.

SUMMARY AND CONCLUSION

* A statistically significant correlation in the prevalence of rheumatological manifestations among patients with type 2 diabetes mellitus than non-diabetics, hence they should be monitored regularly. The rheumatological manifestations were more prevalent in females as compared to males in the diabetic population. In type 2 diabetics periarthritis of shoulder was the common manifestation, found unilaterally in 83.4% and bilaterally in 16.6% of patients.

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Financial or Other, Competing Interest: None.

Submission 02-12-2015, Peer Review 03-12-2015, Acceptance 19-12-2015, Published 24-12-2015.

Corresponding Author: Dr. Vineetha Kolar Venkataravanappa, Byraweshwara Krupa, 2 Cross, 1st Main Jayanagar East, Tumkur-572102, Karnataka.

E-mail: drvineetha.anand@gmail.com

DOI:10.14260/jemds/2015/2541

Table 1: Sex distribution of Rheumatological manifestations

Group           Manifestations     Males      Females

Diabetics          Present       14 (23%)    17 (43.6%)
                    Absent       47 (77%)    22(56.4%)
                    Total        61 (100%)   39 (100%)
Non-diabetics      Present        2 (8%)      6 (24%)
                    Absent       23 (92%)     19 (76%)
                    Total        25 (100%)   25 (100%)

Table 2: Comparison of the present study with other studies for the
prevalence of Periarthritis in Type 2 Diabetics and Non-Diabetics

STUDY               DIABETICS   NONDIABETICS

Sarkar RN. (5)        17.9%          7%
Bridgman. (12)         11%          2.5%
Mavrikakis. (13)      31.8%        10.3%
Pal. (14)              19%           5%
Cagleiro E. (9)        12%           0%

Fig. 2: Sex Distribution
                Male   Female
Diabetics       61     39
Non diabetics   25     25

Note: Table made from bar graph.

Fig. 3: Duration of Diabetes
-1 yr      17%
1-5 yr     27%
6-10 yr    27%
11-15 yr   8%
15-20 yr   6%
-20 yr     5%

Note: Table made from pie chart.

Fig. 4: Prevalence of Rheumatological Manifestations
               No   Yes
Diabetes       69   31
Non diabetes   42   8

Note: Table made from bar graph.


Yes = Patients with rheumatological manifestations.

No = Patients without rheumatological manifestations.

Fig.5: Rheumatological manifestations in patients with Type 2
Diabetes Mellitus

FZ     55%
DISH   9%
CTS    9%
OA     24%
CJ     3%

Note: Table made from pie chart.


DISH-Diffuse Idiopathic Skeletal Hyperostosis CTS-Carpal Tunnel Syndrome OA-Osteoarthritis CJ-Charcots Joint

Among the 31 type 2 diabetics with rheumatological manifestations, the commonest is periarthritis of shoulder accounting for 55% of the cases.

Fig.7: Age wise distribution of Rheumatological
manifestations among Diabetics and Non-Diabetics

          Diabetics   Non diabetics
<40yr       3.56           0
41-50yr     15.30          7.60
51-60yr     38.3           0.26
61-70yr     23.07          2.56
>70yr       10.36          0

Note: Table made from bar graph.

Fig.8: Correlation of Rheumatological manifestations with
Rheumatoid Factor
               Yes      No
Diabetes       11.510   11.458
Non diabetes   22.413   14.593

Yes = Patients with rheumatological manifestations

No = Patients without rheumatological manifestations
Note: Table made from bar graph.


Vineetha Kolar Venkataravanappa [1], AnandSorikunte Huchappa [2]

[1] Assistant Professor, Department of General Medicine, Sree Siddhartha Medical College, Tumkur.

[2] Associate Professor, Department of Radio-Diagnosis, Sree Siddhartha Medical College, Tumkur.
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Title Annotation:Original Article
Author:Venkataravanappa, Vineetha Kolar; Huchappa, AnandSorikunte
Publication:Journal of Evolution of Medical and Dental Sciences
Article Type:Report
Date:Dec 24, 2015
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