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Table 5 AMS and neurology variables

From: The physiological effects of hypobaric hypoxia versus normobaric hypoxia: a systematic review of crossover trials

Outcome Author and year Duration of exposure (h:min) Hypobaric hypoxia result [mean (SD)] Normobaric hypoxia result [mean (SD)] Difference (HH − NH) P value Direction of difference NH compared to HH
Length of centre of pressure trajectory in Y axis        
 Eyes open 1,700 m Degache 2012 00:30 114.2 (38.8) 129.5 (53.3) -15.3 - NH > HH
 Eyes closed 1,700 m Degache 2012 00:30 127.2 (54.9) 87.7 (44.8) 39.5 - HH > NH
 Dual task 1,700 m Degache 2012 00:30 128.7 (87.1) 79.9 (30.3) 48.8 - HH > NH
 Romberg’s index 1,700 m Degache 2012 00:30 1.35 (0.19) 1.42 (0.34) -0.07 - -
 Eyes open 3,000 m Degache 2012 00:30 123.1 (22.6) 127.2 (41.5) -4.1 - -
 Eyes closed 3,000 m Degache 2012 00:30 104.7 (27.0) 89.1 (39.9) 15.6 - HH > NH
 Dual task 3,000 m Degache 2012 00:30 91.9 (22.4) 82.4 (30.4) 9.5 - HH > NH
 Romberg’s index 3,000 m Degache 2012 00:30 1.33 (0.22) 1.39 (0.29) -0.06 - -
Variance of speed of CoP        
 Eyes open 1,700 m Degache 2012 00:30 111.0 (56.2) 151.4 (30.2) -40.4 - NH > NH
 Eyes closed 1,700 m Degache 2012 00:30 111.0 (58.8) 149.9 (31.5) -38.9 - NH > HH
 Dual task 1,700 m Degache 2012 00:30 112.1 (57.7) 151.1 (31.7) -39 - NH > HH
 Romberg’s index 1,700 m Degache 2012 00:30 0.98 (0.09) 0.99 (0.03) -0.01 - -
 Eyes open 3,000 m Degache 2012 00:30 150.5 (42.3) 160.8 (14.0) -10.3 - NH > HH
 Eyes closed 3,000 m Degache 2012 00:30 142.9 (40.8) 158.6 (13.7) -15.7 - NH > HH
 Dual task 3,000 m Degache 2012 00:30 143.4 (39.2) 160.1 (15.0) -16.7 - NH > HH
 Romberg’s index 3,000 m Degache 2012 00:30 0.95 (0.11) 0.99 (0.02) -0.04 - -
Lake Louise AMS scores Self 2011 00:01 - - 2.36 >0.05 NS
Self 2011 00:04 - - -4.89 >0.05 NS
Roach 1996 09:00 - - - <0.01 HH > NH
Loeppky 2005* 10:00 - - - <0.001 HH > NH
  1. This table lists all the values of the measured variables that relate to AMS and neurology.
  2. NS insignificant.
  3. *P value calculated including hypobaric normoxia.