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Table 1 Total class sizes per year, per academic program at time of investigation and percentage of students participating in the study.

From: Lower back pain in physically demanding college academic programs: a questionnaire based study

Course Students participating in the study per year of study (% of total) Total
  First Second Third Fourth  
Equine Science (n = 43) 7/23 (30%) 9/20 (45%) 15/15 (100%) 12/12 (100%) 43/67 (64%)
Physical Education (n = 70) 37/80 (46%) 16/71 (22%) 12/42 (29%) 5/43 (12%) 70/236 (30%)
Sports and Exercise Science (n = 75) 10/40 (25%) 33/47 (70%) 14/37 (38%) 18/35 (51%) 75/159 (47%)
Total (n = 188) 54/143 (38%) 138 (42%) 41/92 (45%) 35/89 (39%) 188/462 (41%)