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Table 2 Importance and consensus on biochemical validation methods (R2: n = 48, R3: n = 37)

From: Exploring consensus on how to measure smoking cessation. A Delphi study

Factors R2: Mdn R2: IQR R3: Mdn R3: IQR
Anabasine, using urine samples 4.00 2.00 4.00 2.00
Carbon monoxidea 6.00 3.00 6.00 1.00
The assessment method to detect carbon monoxide:     
 • Expired air samplesa 6.00 2.00 6.00 1.00
 • Blood samples 4.00 3.00 4.00 1.00
Cotininea 6.00 1.00
 • Saliva samplesa 6.00 1.00
 • Urine samples 5.00 2.00 5.00 1.00
 • Blood samples 4.00 2.00 4.00 0.00
 • Hair samples 4.00 2.00 4.00 1.00
 • Plasma samples 4.00 2.00 4.00 1.00
 • Serum samples 4.00 1.00
Thiocyanate 4.00 2.00 4.00 1.00
The assessment method to detect thiocyanate:    4.00 1.00
 • Plasma samples 4.00 1.00
 • Saliva samples 4.00 1.00
 • Urine samples 4.00 2.00 4.00 0.00
  1. Mdn median score, IQR interquartile range
  2. a = Consensus (IQRs ≤1) on important items (Mdn ≥ 6)