Time-Dependent Cox
Time-Dependent Cox is one of the statistical analyses automatically performed in MerQur. This page provides an illustrative demonstration, using a sample data set from the field of Sport Sciences, of how the analysis is applied, how the MerQur output appears, and how it is reported in APA 7 format.
🎯 What is it for?
Time-Dependent Cox automatically performs all required assumption checks (normality, homogeneity of variance, etc.) for the relevant data type in the background and presents the results with a clear table + chart. Automatic interpretation to the APA 7 standard, effect sizes such as Cohen’s d/η²/R², and 95% confidence intervals are reported.
📌 When is it used?
- In the statistical analysis of measurements in the field of Sport Sciences
- To generate APA 7-compliant result tables for academic publication
- In hypothesis testing and decision-making processes
- After selecting an appropriate method in undergraduate / master’s / doctoral theses
📐 Assumptions
- Appropriate scale — Variables must be at the scale level required by the analysis (nominal/ordinal/interval/ratio)
- Independent observations — Observations must come from mutually independent individuals
- Adequate sample — The minimum n requirement for the analysis must be met
- Outlier check — Outliers must be detected and evaluated
If the assumptions are violated, MerQur automatically steers you toward a non-parametric or robust alternative.
🛠 How to do it in MerQur
Load the data. Select the sample file from the File → Open menu. MerQur automatically detects column types.
Select the analysis. From the left sidebar, select Time-Dependent Cox.
Panel assignments (form fields in the program):
- id_col:
sporcu_id - start_col:
baslangic - stop_col:
bitis - event_col:
olay - Covariates:
['stres_skoru'] - penalizer:
0.0
Optional settings. Effect size ✓ · 95% confidence interval ✓ · Assumption checks (automatic).
Press the ▶ Run button. Results are generated automatically as tables + charts.
📄 Export to Word. A report in APA 7 format with italicized statistical symbols.
📊 Sample Dataset — Spor Bilimleri
ℹ Note: The MerQur output and interpretation tables on this page are illustrative and intended to help understand the analysis. The numerical results for your own data may differ; this page does not have to match the YouTube video walkthrough exactly.
🎬 Example File Used in the Video
The YouTube video walkthrough of this page was recorded using the sample file below for the Sports Sciences field:
MerQur_Hoca_Tanitim/Spor_Bilimleri/90_tvcox.xlsx
Data Preview (First 5 Rows)
| sporcu_id | baslangic | bitis | stres_skoru | olay |
|---|---|---|---|---|
| 1.00 | 0 | 0.50 | 37.10 | 0 |
| 1.00 | 0.50 | 1.00 | 36.70 | 0 |
| 1.00 | 1.00 | 1.50 | 43.10 | 0 |
| 1.00 | 1.50 | 2.00 | 48.20 | 0 |
| 1.00 | 2.00 | 2.50 | 51.50 | 0 |
n = 1160 · Sütunlar: sporcu_id, baslangic, bitis, stres_skoru, olay
MerQur Output (Illustrative)
MerQur Interpretation (Plain Language)
Time-Dependent Cox revealed a statistically significant finding among the relevant variables (p < .001). Detailed results and visualizations are generated automatically in MerQur’s output panel.
APA 7 Interpretation (Academic Format · Illustrative)
baslangic (p < .001). The effect size was moderate-to-large, indicating that the findings carry practical significance. MerQur’s APA 7 Word output can be used for a detailed report.⚠ Common Mistakes
- Specifying the data type incorrectly (e.g., loading a categorical variable as numeric)
- Skipping the assumption checks and looking directly at the p-value
- Not reporting the effect size — APA 7 requires both p and the effect size
- Not applying a Type I error correction (Bonferroni/Tukey) in multiple comparisons
- Not switching to a non-parametric alternative when n is insufficient
📹 Video Walkthrough
You can watch the video below for an end-to-end application of this analysis using the Sports Sciences file.
🎓 Educational Sciences · 🧪 Natural Sciences and Mathematics · 🏛 Architecture, Planning and Design · ⚙ Engineering · 🏥 Health Sciences · 📊 Social, Humanities and Administrative Sciences · 🌾 Agriculture, Forestry and Aquaculture
📚 If You Used This Analysis, Cite MerQur
If you performed this analysis in a scientific study using MerQur, please use the following citation (APA 7) in accordance with the academic citation requirement:
Örücü, Ö. K. (2026). MerQur: An Integrated Academic Data Analysis and Reporting Platform [Computer Software] (Version 1.0.0). https://doi.org/10.53463/merqur.2026001
For BibTeX, RIS, EndNote and the English equivalent: all citation formats →
- American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.).
- Field, A. (2018). Discovering statistics using IBM SPSS Statistics (5th ed.). Sage.
- Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Lawrence Erlbaum.