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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

VariableFrequency (%) n = 482 (100%)Have you ever had a knee injury?P value
Yes n = 112 (23.2%)No n = 370 (76.8%)
Age
 1836 (7.5)5 (13.9)31 (86.1) 
 1948 (10)9 (18.8)39 (81.3) 
 2079 (16.4)17 (21.5)62 (78.5) 
 2196 (19.90)22 (22.9)74 (77.1)0.030
 2265 (13.50)15 (23.1)50 (76.9) 
 2362 (12.90)9 (14.5)53 (85.5) 
 2430 (6.22)9 (30.0)21 (70.0) 
 2566 (13.70)26 (39.4)40 (60.6) 
Mean ± SD21.54 ± 2.0922.02 ± 2.1921.4 ± 2.040.005
Age groups
 18–21 years259 (53.73)53 (20.5)206 (79.5)0.120
 22–25years223 (46.27)59 (26.5)164 (73.5) 
Weight (mean ± SD)80.05 ± 21.9681.97 ± 22.0779.47 ± 21.920.293
Hight (mean ± SD)173.79 ± 7.32174.98 ± 6.27173.44 ± 7.580.23
BMI classifications
 Underweight35 (7.3)3 (8.6)32 (91) 
 Normal210 (43.6)55 (26.2)155 (73.8)0.025
 Overweight125 (25.9)35 (28)90 (72) 
 Obese I59 (12.2)7 (11.9)52 (88.1) 
 Obese II31 (6.4)9 (29)22 (71) 
 Obese III22 (4.6)3 (13.6)19 (86.4) 
 Mean ± SD26.37 ± 6.826.31 ± 5.9626.39 ± 7.050.511
Obesity
 Yes112 (23.2)19 (17)93 (83).075
 No370 (76.8)93 (25.1)277 (74.9)
Health status
 Poor11 (2.28)2 (18.2)9 (81.8)0.584
 Fair26 (5.39)8 (30.8)18 (69.2)
 Good102 (21.16)28 (27.5)74 (72.5)
 Very good177 (36.72)36 (20.3)141 (79.7)
 Excellent166 (34.44)38 (22.9)128 (77.1)
Activity level
 Non-sporting138 (28.63)25 (18.1)113 (81.9)0.004
 Sporting sometimes226 (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
 0–1283 (58.71)59 (20.8)224 (79.2)0.118
 2–3101 (20.95)22 (21.8)79 (78.2)
 4–660 (12.45)21 (35.0)39 (65.0)
 7 +38 (7.88)10 (26.3)28 (73.7)
Knowledge level
 High205 (42.5)41 (20)164 (80)0.148
 Low277 (57.5)71 (25.6)206 (74.4)