Participants were included in the final cohort for analysisif they fulfilled the following criteria: (1) downloaded the app; (2) provided consent; (3) completed the baseline questionnaire; and (4) contributed at least one pain event and matched control period in the same month (see below). ...
The study used a smartphone app to collect daily data from participants, including pain symptoms, mood, physical activity, and weather data from nearby weather stations. The data was analyzed using a case-crossover design, comparing the weather on pain-event days to weather on control days withi...