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Table 5 Data collection schedule

From: Dose–response of spinal manipulation for cervicogenic headache: study protocol for a randomized controlled trial

Outcomes Variables BL1 BL2 2W 6W 12W 24W 39W 52W
Background Demographics; comorbidities Q        
  Duration of episode; history of SMT and massage care   Q       
Primary Objective Dose-Response
Headache CGH frequency in 4 weeks prior Q D, Q   D, Q D, Q D, Q D, Q D, Q
  CGH pain Q D, Q   D, Q D, Q D, Q D, Q D, Q
  CGH disability   Q   Q Q Q Q Q
  CGH improvement: pain, global perceived effect     Q Q Q Q Q
  Other headache days   D, Q   D, Q D, Q D, Q D, Q D, Q
Neck Pain Frequency (days) of neck pain Q Q   Q Q Q Q Q
Quality of Life EuroQol-5D   Q    Q Q Q Q
Satisfaction Likert Scale, success of care     Q Q Q Q Q
Medication Frequency of prescription and non-prescription medication (days)   D, Q   D, Q D, Q D, Q D, Q D, Q
Outside Care CGH care from external providers   Q Q Q Q Q Q Q
Objective Measures Kinematics and cervical segmental joint function X    X     
Secondary Objective Cost Effectiveness
 Healthcare Utilization and lost productivity    Q   Q Q Q Q Q
 Utilities Quality-adjusted life years EuroQol-5D   Q    Q Q Q Q
 Outcomes CGH frequency (days) and intensity (in last 4 wks) Q D, Q   D D D D D
Tertiary Objective Effects of Expectations
 Quantitative Confidence in treatment success   Q Q Q Q Q Q Q
  Perceptions of the Patient-provider encounter    Q Q     
 Qualitative Meaning, constructs of expectations     I     
  1. Key: BL baseline, SMT spinal manipulation therapy, W weeks, CGH cervicogenic headache, Q questionnaire, D diary, I interview, X indicates occurrence