NTx (Collagen Cross-Linked N-Telopeptide) Urine Test
Short Name: NTx Urine Test
Also known as: N-Telopeptide Urine Test, NTx Urine Assay, Bone Resorption Marker Test
NTx (Collagen Cross-Linked N-Telopeptide) Urine Test test available at DNA Labs India for ₹4,973. Uses Chemiluminescence on Urine samples. Results in Report available in 10 days after sample collection.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Ramarao Paidisetty
Consultant Biochemist · Reg: 21504
Last reviewed: September 7, 2026
Overview
The primary purpose of the NTx Urine Test is to evaluate bone metabolism by measuring the excretion of N-telopeptide, a marker of bone resorption. It helps in diagnosing osteoporosis and other bone disorders, assessing fracture risk, and monitoring response to therapy. For patients on osteoporosis treatment, a decline of 30% or more in NTx levels over six months indicates effective therapy, allowing healthcare providers to adjust treatment plans accordingly.
- Test Code
- 1322
- Price
- ₹4,973
- Sample Type
- Urine
- Result Time
- Report available in 10 days after sample collection.
- Fasting Required
- No
- Method
- Chemiluminescence
Sample Collection
Ensure the second morning urine sample is collected. Avoid adding preservatives and use a sterile container. Follow any specific instructions from your healthcare provider.
Method: Second morning urine sample
Laboratory Analysis
Collect at least 10 mL of urine using a clean-catch method to minimize contamination. Label the container properly with patient details.
Report Delivery
Store the sample as per stability guidelines. If not transporting immediately, refrigerate or freeze the sample to preserve integrity.
Timeline: Report available in 10 days after sample collection.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of the NTx Urine Test is to evaluate bone metabolism by measuring the excretion of N-telopeptide, a marker of bone resorption. It helps in diagnosing osteoporosis and other bone disorders, assessing fracture risk, and monitoring response to therapy. For patients on osteoporosis treatment, a decline of 30% or more in NTx levels over six months indicates effective therapy, allowing healthcare providers to adjust treatment plans accordingly.
How to Prepare
- Collect the second void of the morning urine
- Use a sterile container without preservatives
- Do not acidify the specimen
- Ensure minimum volume of 10 mL
- Transport refrigerated or frozen within stability period
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"The NTx test is essential for monitoring bone resorption in osteoporosis patients. A decline of 30% or more in NTx levels over six months indicates effective therapy, helping guide treatment decisions."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Acidified specimen
- Sample with preservatives added
- Insufficient volume (<10 mL)
- Improperly stored or transported sample
- Contaminated specimen
Understanding Your Results
Indicates increased bone resorption; possible osteoporosis, hyperparathyroidism, or other bone disorders. Further evaluation recommended.
Level: High NTx
Suggests normal bone turnover within reference ranges for age and sex. Continue monitoring if indicated.
Level: Normal NTx
May indicate low bone resorption, which could be due to effective therapy or other factors. Consult healthcare provider for context.
Level: Low NTx
Consult a doctor if NTx levels are elevated or if you experience symptoms such as frequent fractures, severe back pain, loss of height, or joint stiffness. Regular monitoring is advised for individuals on osteoporosis treatment.
Limitations
- ⚠Results may vary with diet, hydration, and time of collection
- ⚠Not a standalone diagnostic tool; clinical correlation and other tests may be needed
- ⚠Limited to assessing bone resorption, not bone formation or density
- ⚠Reference ranges may differ between laboratories and populations
Risks & Considerations
- ●No significant risks; non-invasive urine test with minimal discomfort during collection
Interfering Factors
- ●Use of preservatives in urine sample
- ●Acidified specimen
- ●Recent high-protein diet or excessive meat consumption
- ●Dehydration or overhydration affecting urine concentration
- ●Certain medications such as bisphosphonates or hormonal therapies
Compare With Similar Tests
| Test | NTx (Collagen Cross-Linked N-Telopeptide) Urine Test | DEXA (Bone Density Scan) | Serum Calcium Test | Vitamin D Test | Alkaline Phosphatase (ALP) Test |
|---|---|---|---|---|---|
| Comparison | NTx (Collagen Cross-Linked N-Telopeptide) Urine Test |
Frequently Asked Questions
What is the NTx Urine Test?
Why is the NTx test recommended?
How is the urine sample collected?
Is fasting required before the test?
What do high NTx levels indicate?
What do low NTx levels mean?
How long does it take to get results?
Is home sample collection available?
What is the cost of the NTx test?
How accurate is the NTx test?
Can diet affect NTx levels?
What other tests are needed for bone health?
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