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Table 1 Baseline characteristics of all included helicopter pilots irrespective of training program. Values in median and Interquartile range (IQR)

From: Impact of exercise programs among helicopter pilots with transient LBP

  All included n = 39 Male pilots n = 35 Per protocol1 n = 20
Sex 35 males (90%) 35 males (100%) 16 males (80%)
Age years 36 (33, 43) 37 (33, 44) 36.5 (34.3, 42.8)
Height cm 183 (176, 185) 183 (178, 187) 181.5 (173.8, 188.5)
Weight kg 85 (78, 93) 86 (78, 94) 85.5 (79.3, 94.8)
BMI 25.7 (24.3, 27.1) 25.7 (24.3, 27.1) 26.3 (24.6, 27.6)
VAS (0–10) 3 (2, 5) 3 (2, 5) 3 (2, 5.8)
ODI % 10 (6, 14) 10 (6, 14) 9 (6, 13.5)
EQ-5D (0–100) 79 (70, 88) 79 (70, 88) 79 (73.5, 90)
Flying experience
 Years 12 (8, 16) 12 (8, 17) 11 (8.3, 16.8)
 Flying hours 4000 (3400, 7000) 5000 (3500, 7000) 4400 (3330, 6760)
 Hours in “Large” helicopter 2900 (2100, 4800) 3200 (2100, 4800) 3150 (2100, 4800)
 Hours last year 600 (450, 700) 620 (460, 700) 600 (463, 700)
 SVG2 30 (28 males) 26 (males) 16 (12 males)
 BGO3 9 (males) 9 (males) 4 (males)
 S924 32 29 16
 AS332 L/L25 7 6 4
 EC2256 - - -
Muscular endurance in seconds
 Extension 47 (30, 78) 47 (30, 78) 59 (34, 83)
 Flexion 55 (38, 83) 55 (38, 83) 45 (34, 82)
 RSB7 32 (24, 46) 33 (25, 47) 31 (23, 44)
 LSB8 39 (20, 52) 40 (26, 52) 44 (31, 57)
 Total holding time 190 (140, 253) 196 (140, 253) 199 (142, 268)
Ultrasound in percent9
 Level L4–5 8.1 (5.2, 11.1) 8.3 (5.7, 11.1) 7.3 (5.1, 10.3)
 Level L5-S1 6.3 (2.1, 8.6) 6.6 (2.1, 8.6) 4.1 (2.1, 7.2)
 Right side L4–5 & L5-S1 5.9 (2.5, 9.5) 6.4 (3.3, 9.5) 4.5 (2.3, 9.1)
 Left side L4–5 & L5-S1 6.8 (3.7, 12.4) 6.8 (4.0, 12.4) 6.4 (3.7, 10.2)
 Both levels and sides 7.5 (3.7, 9.7) 7.7 (3.9, 9.7) 5.3 (3.6, 8.0)
  1. 1Per protocol: pilots performing ≥19 of scheduled 36 training sessions. 2SVG = Stavanger/Sola base. 3BGO = Bergen/Flesland base. 4Sikorsky helicopter type S92. 5Airbus (Eurocopter) Helicopter Super Puma type AS 332 L/L1/L2. 6Eurocopter EC225 Super Puma (Airbus Helicopters H225). 7RSB = Right Side Bridge. 8LSB = Left Side Bridge. 9Values given in %-change from relaxed to contracted muscle