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Call to address obesity & associated health issues

Obesity and diabetes are closely linked, with 80 per cent of patients with type 2 diabetes considered obese. Photo: file/Bruce Barnard.

An Auckland endocrinologist is calling for more to be done to address obesity, and associated health issues, in New Zealand

Dr Ole Schmiedel says steps need to be taken to improve obesity messaging and to target those most at risk if we are to stem the impact of a diabetes epidemic on our health system.

Latest government health figures show almost one in three Kiwis over the age of 15 are obese.

The national prevalence of obesity has increased in the year to 2019/2020, particularly levels of ‘morbid-obesity’ - defined as having a body mass index (BMI) 40-50 kg/m2.

The life expectancy of those living with severe or morbid obesity is shortened by about 8-10 years.

Obesity affects Maori and Pasifika to a greater degree with prevalence rates of 48 per cent and 63 per cent respectively, is a modifiable risk factor contributing to inequities in health outcomes and unnecessary premature deaths, says Schmiedel.

Obesity and diabetes are closely linked, with 80 per cent of patients with type 2 diabetes considered obese.

Obesity is also associated with other comorbidities, including kidney failure, fatty liver, breathing problems, reduced mobility, chronic joint pain, and increased death rates from heart disease and several cancers.

In New Zealand, the prevalence of type 2 diabetes is estimated to be 4.7 per cent, however, the prevalence is higher for Maori (5.3 per cent), Asian (5.7 per cent), and Pasifika (11.1 per cent) than European and other ethnicities (4.7 per cent).

Schmiedel says Pasifika people are also set to see the largest increases in type two diabetes, with estimates of up to 16.2 per cent of their people living with the disease by 2040.

He says Maori and Pasifika also make up the largest population group in New Zealand dialysis units.

Dr Ole Schmiedel says he's especially concerned about the rising incidence of type 2 diabetes in children and young adults, as this early presentation causes a more aggressive disease, greater numbers of complications and earlier death from complications of the disease than type 1 or type 2 diabetes diagnosed in older age groups.

Dr Ole Schmiedel. Supplied image.

He says a report, recently presented to the Ministry of Health, points to the cost associated with type 2 diabetes in young people, which costs the country more than half a million dollars additionally for each person over their lifetime.

“Two decades ago, type 2 diabetes in childhood and adolescents was virtually unknown, however now it is common for patients of this age group to present with the disease.

“One current method of care for super-obesity after exhausting all other options is bariatric surgery, however, each gastric sleeve/bypass costs the government around $9,000-$12,000, and only a very limited number of surgeries are publicly funded per year.

“Consequently, this method does not substantially impact the rising number of people living with obesity and diabetes in New Zealand; and only approximately 0.5 per cent of the eligible population can receive this treatment in the public sector,” he says.

Schmiedel says research shows in adults with type 2 diabetes, weight loss of 5-10 per cent can increase the likelihood of disease remission as well as improving other obesity related comorbidities.

“Talking about weight is not easy and many misconceptions, stigma and denial prevent us from having an open and educated debate.

“It is essential that we never blame and shame those who carry excess weight and struggle with obesity. As a society we need to broaden our understanding that there are many social determinants of health, including our obesogenic environment, which is responsible for this problem.

“In addition, we know that complex mechanisms in the brain play a role in regulating hunger and cravings which can manifest as a further barrier to weight loss,” he says.

Schmiedel says, if we start having conversations with people and their whanau at an early stage we can prevent many complications and may even be able to bring type 2 diabetes into remission.

“It is well proven that modest weight reductions can lead to significant improvements in many of the associated complications, including type 2 diabetes and high blood pressure.

“This is something achievable and we need to aim for realistic and sustainable weight loss,” he says.

Schmiedel says, when we are talking about weight it is not so much about the kilograms lost but more about the reduction of problems related to excess weight.

“When people come to me for management of their weight, they are concerned about weight related problems. People want sustainable weight loss and as clinicians we need to be able to support them on this lifelong journey.

“It is so important that people have a chance to be understood with respect to their weight problems, that we as a community, address weight without stigmatisation and blame, overcome old misconceptions, and support and help wherever possible.

“I encourage people to find an empathetic healthcare provider they feel safe initiating a conversation with who can tell them about the options available to them.

“It is time that we as society start taking obesity seriously and head off a preventable disease epidemic that we are facing,” he says.

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