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Table 1 Baseline characteristics of the participants

From: High prevalence of low back pain among young basketball players with lower extremity pain: a cross-sectional study

Variables Categories Median (IQR) Total, N (%) Low back pain, N (%)
Total    592 76
Gender Male   332 (56.1) 35 (46.1)
Female   260 (43.9) 41 (53.9)
Age (years)   13.0 (12.0, 14.0)   
Body mass index   18.3 (16.7, 19.8)   
Team levels Recreation   30 (5.1) 2 (2.6)
Local competition   376 (63.5) 49 (64.5)
Prefectural competition   169 (28.5) 22 (28.9)
Tohoku district or national competition   17 (2.9) 3 (3.9)
Training per week (days)   5.0 (3.5, 6.0)   
Practice per day weekdays (hours)   2.0 (2.0, 2.5)   
Practice per day weekends (hours)   3.0 (3.0, 4.0)   
Frequency of participation in games never   31 (5.2) 3 (3.9)
seldom   57 (9.6) 7 (9.2)
sometimes   175 (29.6) 21 (27.6)
often   329 (55.6) 45 (59.2)
Practice intensity Low-to-medium   203 (34.3) 18 (23.7)
High   389 (65.7) 58 (76.3)