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Table 7 Comparison between the present study and studies of Bohannon[3] and Andrews[9] for male

From: Reference values for isometric muscle force among workers for the Netherlands: a comparison of reference values

Male Dominant Non dominant
Muscle force Douma Bohannon Andrews Douma Bohannon Andrews
Mean (95% CI) Mean Mean Mean (95% CI) Mean Mean
Elbow flexion       
  Age group       
  20-29 281 (267-295) 285 - 261 (247-276) 279 -
  30-39 273 (259-287) 269 - 266 (252-281) 281 -
  40-49 271 (258-286) 269 - 261 (249-274) 270 -
  50-59 259 (246-272) 287 292 245 (232-257) 268 272
Elbow extension       
  Age group       
  20-29 186 (175-197) 244 - 182 (171-194) 245 -
  30-39 185 (172-194) 214 - 179 (167-192) 231 -
  40-49 185 (174-196) 210 - 179 (169-190) 214 -
  50-59 181 (171-190) 197 188 173 (164-182) 186 178
Knee extension       
  Age group       
  20-29 379 (348-409) 575 - 371 (339-404) 579 -
  30-39 351 (323-378) 573 - 341 (312-369) 572 -
  40-49 368 (341-395) 583 - 341 (315-366) 589 -
  50-59 337 (310-363) 471 448 335 (308-362) 468 -439
Shoulder abduction       
  Age group       
  20-29 172 (144-200) 258 - 173 (152-193) 246 -
  30-39 181 (165-196) 249 - 176 (159-192) 237 -
  40-49 173 (158-188) 246 - 177 (163-191) 244 -
  50-59 178 (165-191) 240 238 177 (163-191) 223 -222
  1. Bold printed numbers are values outside the 95%CI of this study.
  2. Age groups are given in decades in years, Muscle force is given in Newtons, LCL = lower control limit, UCL upper control limit, – not available.