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 ===== Background =====
-Multimorbidity is commonly defined as the presence of two or more chronic non-communicable diseases in the same individual. However, a simple disease count does not describe which diseases occur together or distinguish between people with substantially different health profiles. The multimorbidity configurations in this secondary dataset provide a more informative classification of chronic disease combinations among older adults participating in Lifelines.
+Multimorbidity is commonly defined as the presence of two or more chronic non-communicable diseases (NCDs) in the same individual. However, a simple disease count does not describe which diseases occur together or distinguish between people with substantially different health profiles. The multimorbidity configurations in this secondary dataset provide a more informative classification of chronic disease combinations among older adults participating in Lifelines.
 The patterns were derived among adults aged 60 years or older. Forty-five chronic conditions were grouped into 14 non-communicable disease domains: cancer, major cardiovascular events, other heart and peripheral vascular conditions, hypertension, arthritis, osteoporosis, digestive diseases, diabetes, kidney diseases, respiratory diseases, thyroid diseases, neurodegenerative disorders, depression, and obesity. A domain was considered present when the participant met at least one applicable criterion based on self-reported diagnosis, treatment, medication use, clinical measurements, laboratory results, or medical procedures.
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-===== Background =====
+===== Calculation and interpretation =====
+For each general assessment, the number of affected disease domains was calculated by summing the 14 binary indicators. Participants with fewer than two affected domains were classified as having no multimorbidity, while those with two or more were classified as having multimorbidity.
+Latent class membership was estimated separately for the first and second assessment waves. The resulting variable describes membership in the latent disease configurations and includes a separate No NCDs category. The publication variable mcs combines the baseline latent class membership with the conventional multimorbidity definition. Participants with fewer than two disease domains are classified as No multimorbidity, regardless of their initial latent class. The mcs variable is therefore recommended for reproducing the baseline analyses reported in the publication.\\
+\\
+===== Variables =====
+| **Label English**                                                                                      | **Label Dutch**  | **Code**                           | **Variable**    | **Assessment**   | **Age**  |
+| Number of non-communicable diseases                                                                    |                  | multimorbidity_number_adu_c_1      | ltc_count       | [to be checked]  | 60+      |
+| Multimorbidity classification                                                                          |                  | multimorbidity_definition_adu_c_1  | multimorbidity  |                  | 60+      |
+| Multimorbidity category (derived from dominant characteristics of each group, not clinical diagnoses)  |                  | multimorbidity_category_adu_c_1    | lca5_a_cat      |                  | 60+      |
+|                                                                                                        |                  |                                    | mcs             |                  | 60+      |
+\\
+===== Publications =====
+  * [[https://doi.org/10.1186/s12877-025-06029-x|Ogaz-González, R., Zou, Q., Du, Y., Gutiérrez-Robledo, L. M., Escamilla-Santiago, R., López-Cervantes, M., & Corpeleijn, E. (2025). Multimorbidity patterns in older adults from Northern Netherlands: Comparing factor analysis and latent class analysis solutions. BMC Geriatrics, 25, 381. DOI: https://doi.org/10.1186/s12877-025-06029-x]]