Does Research Activity Reflect the Burden of Scoliosis? A Bibliometric Analysis of Etiologic Subtypes

Imagine the world of medical research as a massive, bustling library. Inside, millions of books and articles are written every year, each one trying to solve a different piece of the human body's puzzle. One specific section of this library is dedicated to "scoliosis," which is just a fancy word for when the spine curves sideways instead of standing straight up. Think of the spine like a garden hose; sometimes, instead of lying straight, it twists into an "S" or a "C" shape. This can happen for many different reasons: sometimes it's just a mystery that happens as kids grow up, sometimes it's because the bones didn't form correctly before birth, sometimes it's caused by weak muscles from other diseases, and sometimes it happens because the spine wears out as people get older.

The big question this study asks is: "Is the library fair?" If a certain type of spine curve affects a huge number of people, should there be a huge section of books about it? Or do the librarians (the scientists) just keep writing about the most famous type, even if it's not the most common? It's like if a town had a massive problem with potholes, but the city council only spent all its money fixing the one pothole on the mayor's street, ignoring the thousands of others. This paper dives into the data to see if the amount of research matches the actual number of people suffering from each type of spine curve.

The Great Spine Research Audit

To answer this, the authors went on a massive digital treasure hunt. They searched a giant database called Scopus, looking for every single article and review about scoliosis published between 2010 and 2025. They didn't just guess; they used a super-smart computer program to sort these 27,190 documents into different "buckets" based on why the spine was curved. They found buckets for "Adolescent Idiopathic Scoliosis" (the mystery curve in teenagers), "Degenerative/Adult" (the wear-and-tear curve in older folks), "Neuromuscular" (curves caused by muscle diseases), "Congenital" (curves from birth defects), and "Syndromic" (curves linked to other genetic conditions).

The Surprise: The Library is Unbalanced

Here is the twist: the library is very unbalanced. The most famous bucket, Adolescent Idiopathic Scoliosis (AIS), is the biggest one. It contains 6,818 documents, which is about 25.1% of everything they found. Even if you only look at the articles where the cause was clearly identified, AIS makes up nearly 43.8% of the pile. The authors found that this type of research has been growing steadily, rising from 173 papers in 2010 to 754 in 2025, but its share of the total pie has stayed roughly the same, hovering between 20.2% and 27.2% every year.

However, the paper suggests that this huge pile of research doesn't match the real-world problem. While AIS is common in teenagers, the Degenerative/Adult type of scoliosis affects a much, much larger group of people—over 30% of adults, and nearly 68% of people over 60. Yet, the research for this massive group is surprisingly smaller. It was the second-largest bucket with 4,176 documents (or 15.4% of the total), but it started very small in 2010 and has been growing the fastest, surpassing neuromuscular research by the mid-2010s and approaching the volume of adolescent research by 2025. The authors suggest that the research on adult scoliosis is disproportionately small compared to the huge number of people who have it.

Who Gets the Most Attention?

The study also looked at how "famous" the research is by counting how many times other scientists read and cited these papers. Interestingly, the biggest bucket (AIS) actually had the lowest average number of citations per paper (18.1). In contrast, the adult/degenerative research, despite having fewer papers, was the most "cited," with an average of 23.4 citations per document. This suggests that the papers about adult spines are having a bigger impact per article than the massive pile of teen spine papers.

The other buckets were quite small. Neuromuscular scoliosis had 3,106 documents (11.4%), Syndromic had 1,632 (6.0%), and Congenital had only 990 (3.6%). The authors point out that even though these types are complex and difficult to treat, they get very little research attention compared to their actual burden on patients.

The "Unlabeled" Pile

One of the most interesting findings was a giant pile of 11,639 documents (that's 42.8% of everything!) that the computer couldn't sort into any specific bucket. These were general studies about spine surgery, imaging, or mechanics that didn't specify a cause. The authors suggest this means we are actually underestimating the research for every specific type, but even with this huge "unlabeled" pile, the main types still don't seem to match the number of people affected.

The Map of the Research World

The authors also mapped out who is doing the writing. The United States is the clear leader, with 30,733 author appearances, followed by China (9,059) and Japan (5,981). They found that the scientists seem to split into two distinct teams: one team focuses on adult spinal deformities (with big names like Lafage and Smith), and the other team focuses on pediatric and congenital issues (with names like Qiu and Lenke). These two groups rarely mix, which might explain why the research agendas stay so separate.

The Bottom Line

The paper concludes that the distribution of research does not reflect the burden of the disease. Even though adult degenerative scoliosis affects a massive and growing population, the research volume is still lower than that of adolescent scoliosis. The authors suggest that this imbalance means we need to pay more attention to the "underdog" types of scoliosis, like congenital, neuromuscular, and degenerative forms, to make sure the research matches the needs of the people living with these conditions. They suggest these areas are priorities for future investigation, but they don't claim to have solved the problem yet—just that they've found where the gaps are.