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Table 3 Relationship between adiposity measures and risk of primary joint replacement by gender

From: Relationship between body adiposity measures and risk of primary knee and hip replacement for osteoarthritis: a prospective cohort study

 

Females

Males

Variable

Hazard ratio (95% confidence interval)

P value

Hazard ratio (95% confidence interval)

P value

Weight, kg

    

   Q1 (F <59.7, M <73.0)

1.00

 

1.00

 

   Q2 (F 59.7 to 66.2, M 73.0 to 79.7)

1.84 (1.37 to 2.46)

 

1.30 (0.93 to 1.80)

 

   Q3 (F 66.2 to 74.6, M 79.7 to 87.4)

2.69 (2.04 to 3.54)

 

1.58 (1.15 to 2.16)

 

   Q4 (F >74.6, M >87.4)

4.12 (3.16 to 5.37)

 

2.60 (1.93, 3.49)

 

   Linear model (per 10 kg)

1.42 (1.35 to 1.50)

<0.001

1.41 (1.31 to 1.52)

<0.001

Body mass index, kg/m2

    

   Q1 (F <23.2, M <24.7)

1.00

 

1.00

 

   Q2 (F 23.2 to 25.9, M 24.7 to 26.8)

1.85 (1.38 to 2.47)

 

1.40 (1.00 to 1.97)

 

   Q3 (F 25.9 to 29.3, M 26.8 to 29.2)

2.68 (2.03 to 3.54)

 

2.23 (1.63 to 3.06)

 

   Q4 (F >29.3, M >29.2)

3.87 (2.94 to 5.09)

 

2.85 (2.08 to 3.90)

 

   Linear model (per 5 kg/m2)

1.55 (1.45 to 1.66)

<0.001

1.76 (1.56 to 1.98)

<0.001

Waist circumference, cm

    

   Q1 (F <71.0, M <87.0)

1.00

 

1.00

 

   Q2 (F 71.0 to 78.0, M 87.0 to 93.0)

1.72 (1.29 to 2.28)

 

1.45 (1.05 to 2.02)

 

   Q3 (F 78.0 to 87.0, M 93.0 to 99.0)

2.24 (1.70 to, 2.94)

 

1.84 (1.33 to 2.53)

 

   Q4 (F >87.0, M >99.0)

3.03 (2.31 to 3.97)

 

2.39 (1.76 to 3.24)

 

   Linear model (per 10 cm)

1.36 (1.27 to 1.44)

<0.001

1.41 (1.28 to 1.55)

<0.001

Waist-to-hip ratio

    

   Q1 (F <0.74, M <0.88)

1.00

 

1.00

 

   Q2 (F 0.74 to 0.78, M 0.88 to 0.92)

1.25 (0.98 to 1.59)

 

0.94 (0.69 to 1.29)

 

   Q3 (F 0.78 to 0.82, M 0.92 to 0.96)

1.25 (0.98 to 1.59)

 

1.16 (0.86 to 1.57)

 

   Q4 (F > 0.82, M > 0.96)

1.32 (1.04 to 1.68)

 

1.62 (1.22 to 2.15)

 

   Linear model (per 0.1 unit)

1.16 (1.03 to 1.30)

0.01

1.36 (1.16 to 1.60)

<0.001

Fat mass, kg

    

   Q1 (F <21.1, M <18.4)

1.00

 

1.00

 

   Q2 (F 21.1 to 26.5, M 18.4 to 23.0)

1.85 (1.38 to 2.49)

 

1.53 (1.09 to 2.15)

 

   Q3 (F 26.5 to 32.9, M 23.0 to 27.9)

2.60 (1.96 to, 3.45)

 

1.84 (1.33 to 2.55)

 

   Q4 (F >32.9, M >27.9)

4.04 (3.09 to 5.29)

 

2.80 (2.06 to 3.81)

 

   Linear model (per 10 kg)

1.58 (1.47 to 1.69)

<0.001

1.69 (1.51 to 1.89)

<0.001

Percentage fat, %

    

   Q1 (F <35.3, M <25.0)

1.00

 

1.00

 

   Q2 (F 35.3 to 40.1, M 25.0 to 28.9)

1.47 (1.11 to 1.96)

 

1.43 (1.04 to 1.99)

 

   Q3 (F 40.1 to 44.6, M 28.9 to 32.6)

2.12 (1.62 to 2.77)

 

1.51 (1.09 to 2.08)

 

   Q4 (F >44.6, M >32.6)

3.29 (2.55 to 4.24)

 

2.56 (1.90 to 3.45)

 

   Linear model (per 10%)

1.99 (1.76 to 2.26)

<0.001

2.00 (1.67 to 2.39)

<0.001

  1. All models adjusted for age, country of birth, and highest level of education. Linear models represent an approximate change of one standard deviation for each of the adiposity measures. Q1, first quartile; Q2, second quartile; Q3, third quartile; Q4, fourth quartile; F, female; M, male.