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Longitudinal changes across time for all filtered variables: A: Pain; B: Medication consumption; C: Surgery Intent; D: Fear-avoidance beliefs; E: Mental health (GAD-7 and PHQ-9); F: Work productivity (WPAI overall, WPAI work, WPAI activity). Cases filtered according to the following baseline thresholds - medication usage per week > 0 days; surgery intent scores > 0 points; GAD-7 scores ≥ 5 points; PHQ-9 scores ≥ 5 points; all WPAI > 0 points
