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Table 1 Characteristics of the evaluated studies and included patients (FAS)

From: The placebo effect in allergen-specific immunotherapy trials

Extract Histamine No. of placebo patients Age (year, mean, ±SD) Gender (M/F)
SCIT HDM 1 (22) + 62 28.6 (±9.8) 36/26
SCIT HDM 2 * + 50 32.0 (±10.2) 25/25
SCIT Grasses * + 87 31.7 (±9.4) 52/35
SLIT Grasses (23,25) - 55 34.1 (±10.3) 32/23
SCIT Birch 1 (24) - 98 38.4 (±11.4) 45/53
SCIT Birch 2 * - 120 39.0 (±11.2) 58/62
  1. Legend: *data on file.