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Table 2 OI manifestations during the 10-minute NLT

From: Hemodynamics during the 10-minute NASA Lean Test: evidence of circulatory decompensation in a subset of ME/CFS patients

  HCs (n = 75) (%) ME/CFS (n = 150) (%)  < 4 ME/CFS (n = 75) (%)  > 10 ME/CFS (n = 75) (%)
Hemodynamics
 POTS or OH any time sequence 49 54 60 48
 POTS or OH last 3 min standing 35 40 47 33
POTS
 1 min standing 15 15 12 19
 3 min standing 19 25 27 23
 5 min standing 23 28 31 26
 10 min standing 33 40 42 38
OH
 SBP decrease of 20 mm Hg or more 1 6 2 1
 DBP decrease of 10 mm Hg or more 0 1 1 0
OI symptoms
 OI symptoms reported 21a 55a 63c 48c
 OI symptoms PLUS signs 8b 25b 31 20
 OI signs ONLY 31 27 28 25
 OI symptoms ONLY 20a 50a 60 42
 POTS with symptoms 33 36 40 32
 OH with symptoms 1 3 5 1
  1. aP-Value < 0.0005
  2. bP-Value < 0.005
  3. cP-Value < 0.05