INDILACT – Extended voluntary waiting period in primiparous dairy cows. Part 2: Customized VWP – Metadata and R–scripts with statistical calculations

This is part 2 of INDILACT, part 1 is published separately. The objective of this study is to investigate how a customized voluntary waiting period before first insemination in prmiparous dairy cows would affect milk production, fertility and health of primparous dairy cows during their first calving interval. The data was registered between January 2019 and october 2022. This data is archived: - Metadata (publically available) - Raw data (.txt files) from the Swedish national herd recording scheme (SNDRS), operated by Växa Sverige: access restricted due to agreements with the principle owners of the data, Växa Sverige and the farms. Code lists are available in INDILACT part 1. - Aggregated data (Excel files): access restricted due to agreements with the principle owners of the data, Växa Sverige and the farms - R- scripts with statistical calculations (Openly available) Metadata (3 filer): - Metadata gentypning: The only new file type compared to INDILACT Part 1, description of how this data category have been handled. The other file-types have been handled in the same way as in INDILACT Part 1. - Metadata - del 2 - General summary of initioal data handeling for aggregation of the files of the same types (dates etc.) to create excel-files used in the R-scripts. - DisCodes: Divisions of the diagnoses into categories. Raw data: -59 .txt files containing data retrieved from SNDRS from 8 separate occacions. -Data from 18 Swedish farms from Jan 2019 to Oct 2022. Aggregeated data: - 29 Excelfiles. The textfiles have been transformed to Excel formate and all data from the same file type is aggregated into one file. - Data collected from the farms by email and phone contact, about individual cows enrolled in the trial, from Oct 2020 to Oct 2022. - One merged Script derived from initial data handeling in R where relevant variables were calculated and aggregated to be used for statistical calculations. R-script with data handeling and statistical calculations: - "Data analysis part 2 - final": Data handeling to create the file used in the statistical calculations. - "Part 2 - Binomial models - Fertility": Statistiscal calculations of variables using Binomial models. - "Part 2 - glmmTMB models - Fertility": Statistiscal calculations of variables using glmmTMB models. - "Part 2 - linear models - Fertility": Statistiscal calculations of fertility variables using linear models. - "Part 2 - linear models": Statistiscal calculations of milk variables using linear models. Running the R scripts requires access to the restricted files. The files should be unpacked in a subdirectory "data" relative to the working directory for the scripts. See also the file "sessionInfo.txt" for information on R packages used.