Table 1 Distribution of study participants according to demographic profile, body mass index, activity level, and knowledge
From: Prevalence of knee injuries among male college students in Riyadh, Kingdom of Saudi Arabia
Variable | Frequency (%) n = 482 (100%) | Have you ever had a knee injury? | P value | |
|---|---|---|---|---|
Yes n = 112 (23.2%) | No n = 370 (76.8%) | |||
Age | ||||
 18 | 36 (7.5) | 5 (13.9) | 31 (86.1) |  |
 19 | 48 (10) | 9 (18.8) | 39 (81.3) |  |
 20 | 79 (16.4) | 17 (21.5) | 62 (78.5) |  |
 21 | 96 (19.90) | 22 (22.9) | 74 (77.1) | 0.030 |
 22 | 65 (13.50) | 15 (23.1) | 50 (76.9) |  |
 23 | 62 (12.90) | 9 (14.5) | 53 (85.5) |  |
 24 | 30 (6.22) | 9 (30.0) | 21 (70.0) |  |
 25 | 66 (13.70) | 26 (39.4) | 40 (60.6) |  |
Mean ± SD | 21.54 ± 2.09 | 22.02 ± 2.19 | 21.4 ± 2.04 | 0.005 |
Age groups | ||||
 18–21 years | 259 (53.73) | 53 (20.5) | 206 (79.5) | 0.120 |
 22–25years | 223 (46.27) | 59 (26.5) | 164 (73.5) |  |
Weight (mean ± SD) | 80.05 ± 21.96 | 81.97 ± 22.07 | 79.47 ± 21.92 | 0.293 |
Hight (mean ± SD) | 173.79 ± 7.32 | 174.98 ± 6.27 | 173.44 ± 7.58 | 0.23 |
BMI classifications | ||||
 Underweight | 35 (7.3) | 3 (8.6) | 32 (91) |  |
 Normal | 210 (43.6) | 55 (26.2) | 155 (73.8) | 0.025 |
 Overweight | 125 (25.9) | 35 (28) | 90 (72) |  |
 Obese I | 59 (12.2) | 7 (11.9) | 52 (88.1) |  |
 Obese II | 31 (6.4) | 9 (29) | 22 (71) |  |
 Obese III | 22 (4.6) | 3 (13.6) | 19 (86.4) |  |
 Mean ± SD | 26.37 ± 6.8 | 26.31 ± 5.96 | 26.39 ± 7.05 | 0.511 |
Obesity | ||||
 Yes | 112 (23.2) | 19 (17) | 93 (83) | .075 |
 No | 370 (76.8) | 93 (25.1) | 277 (74.9) | |
Health status | ||||
 Poor | 11 (2.28) | 2 (18.2) | 9 (81.8) | 0.584 |
 Fair | 26 (5.39) | 8 (30.8) | 18 (69.2) | |
 Good | 102 (21.16) | 28 (27.5) | 74 (72.5) | |
 Very good | 177 (36.72) | 36 (20.3) | 141 (79.7) | |
 Excellent | 166 (34.44) | 38 (22.9) | 128 (77.1) | |
Activity level | ||||
 Non-sporting | 138 (28.63) | 25 (18.1) | 113 (81.9) | 0.004 |
 Sporting sometimes | 226 (46.89) | 45 (19.9) | 181 (80.1) | |
 Well-trained and frequently sporting A high competitive sports person | 101 (20.95) 17 (3.53 ) | 36 (35.6) 6 (35.3) | 65 (64.4) 11 (64.7) | |
How many hours per week, do you train | ||||
 0–1 | 283 (58.71) | 59 (20.8) | 224 (79.2) | 0.118 |
 2–3 | 101 (20.95) | 22 (21.8) | 79 (78.2) | |
 4–6 | 60 (12.45) | 21 (35.0) | 39 (65.0) | |
 7 + | 38 (7.88) | 10 (26.3) | 28 (73.7) | |
Knowledge level | ||||
 High | 205 (42.5) | 41 (20) | 164 (80) | 0.148 |
 Low | 277 (57.5) | 71 (25.6) | 206 (74.4) |  |