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Table 2 Demographics and key variables stratified into gender and onset of knee pain*

From: Care-seeking behaviour of adolescents with knee pain: a population-based study among 504 adolescents

  Traumatic onset Insidious onset Comparison between females Comparison between males
  Female (n = 110) Male (n = 50) Female (n = 253) Male (n = 91)   
Age [years] median and (IQR) 17 (17–18) 18 (17–18) 17 (16–18) 17 (17–18) 0.138 0.132
Height [cm], mean (95%CI) 168.2 (166.9-169.5) 182.7 (181.1-184.9) 168.1 (167.2-168.9) 182.3 (181.0-183.6) 0.903 0.720
Weight [kg], mean (95%CI ) 64.2 (62.1-66.3) 74.7 (71.8-77.6) 61.1 (59.9-62.4) 72.6 (70.6-74.5) 0.012 0.211
BMI [kg/m2], median (QR) 22.1 (20.2-24.8) 22.2 (20.7-24.5) 21.1 (19.5.2-23.1) 21.6 (20.2-23.5) 0.003 0.232
Gender distribution [% of all in the cohort] (95%CI) 21.8 (14.1-29.5) 9.9 (1.6-18.2) 50.2 (44.0-56.4) 18.1 (10.2-26.0) <0.0001 0.19
Participation in sports during leisure time [% who answered yes] (95%CI) 67.0 (58.1-75.9) 75.5 (63.3-87.7) 70.7 (65.0-76.4) 76.7 (67.9-85.5) 0.478 0.878
Pain frequency (%)       
 Daily 36.4 16.0 25.3 26.4 0.067 0.201
 More than once per week 17.3 14.0 23.3 13.1
 Weekly 30.0 30.0 26.9 36.3
 Monthly 16.4 41.0 24.5 24.2
Pain duration [months], median (IQR) 24 (12–42) 18 (10–36) 24 (12–48) 24 (12–42) 0.382 0.241
Have you sought medical care? [% who replied yes] (95%CI) 80.0 (72.5-87.5) 47.9 (33.6-62.2) 55.7 (49.6-61.9) 49.5 (39.1-59.8) <0.0001 0.863
Currently under treatment? [% who replied yes] (95%CI) 28.2 (19.7-36.6) 20.0 (8.8-31.2) 13.4 (9.2-17.7) 14.3 (7.0-21.5) 0.0001 0.524
EQ-5D index score, median (IQR) 0.78 (0.71-0.82) 0.78 (0.76-0.82) 0.78 (0.72-0.82) 0.78 (0.78-0.82) 0.246 0.8984
EQ-5D-vas, median (IQR) 72 (60–82) 75 (65–88) 72 (54–85) 79 (68–88) 0.868 0.619
  1. *Not cluster adjusted.