Table 2 Baseline determinants of persistent knee pain in men, univariate analyses of Gazel and Cosali cohorts

Age at baseline, in years

.

.

0.6876

.

.

0.4514

20-39

0

-

-

159

1.00 (.-.)

.

.

40-49

0

-

-

132

1.00 (0.63-1.59)

0.9903

.

50-59

709

1.00 (.-.)

.

.

85

1.37 (0.81-2.34)

0.2441

.

60-64

1657

1.00 (0.84-1.20)

0.963

.

0

-

-

.

65-69

824

0.93 (0.76-1.15)

0.514

.

0

-

-

.

BMI at baseline

.

.

<.0001

.

.

0.0428

Normal weight, missing

1074

1.00 (.-.)

.

.

191

1.00 (.-.)

.

.

Overweight

1597

1.34 (1.14-1.57)

0.0003

.

146

1.72 (1.11-2.66)

0.0155

.

Obesity

519

1.67 (1.34-2.08)

<.0001

.

39

1.58 (0.79-3.18)

0.1994

.

Socio-professional category at 35 years/at baseline

.

.

0.1694

.

.

0.0107

Executives, others, missing

541

1.00 (.-.)

.

.

33

1.00 (.-.)

.

.

Associate professionals or technicians

1834

1.08 (0.89-1.32)

0.4232

.

99

3.20 (1.35-7.58)

0.0082

.

Employees

160

0.89 (0.62-1.27)

0.5227

.

26

6.00 (1.94-18.60)

0.0019

.

Manual workers

655

1.24 (0.98-1.57)

0.074

.

218

3.39 (1.51-7.63)

0.0032

.

Carrying/Handling heavy loads**

.

.

<.0001

.

.

0.0928

None, missing

1236

1.00 (.-.)

.

.

201

1.00 (.-.)

.

.

Short or moderate exposure

938

1.09 (0.92-1.30)

0.3201

.

86

1.61 (0.96-2.69)

0.0699

.

Long or severe exposure

1016

1.51 (1.27-1.80)

<.0001

.

89

1.55 (0.93-2.57)

0.0906

.

Carrying/Handling heavy loads**

.

.

0.0007

.

.

0.0295

No, missing

1236

1.00 (.-.)

.

.

201

1.00 (.-.)

.

.

Yes

1954

1.29 (1.11-1.49)

0.0007

.

175

1.58 (1.05-2.38)

0.0295

.

Kneeling

.

.

<.0001

.

.

0.1040

None, missing

1441

1.00 (.-.)

.

.

129

1.00 (.-.)

.

.

Short or moderate exposure

970

1.22 (1.03-1.44)

0.0202

.

132

1.51 (0.93-2.47)

0.0963

.

Long or severe exposure

779

1.62 (1.35-1.95)

<.0001

.

115

1.66 (1.00-2.76)

0.0494

.

Kneeling

.

.

<.0001

.

.

0.036

No, missing

1441

1.00 (.-.)

.

.

129

1.00 (.-.)

.

.

Yes

1749

1.38 (1.19-1.59)

<.0001

.

247

1.58 (1.03-2.43)

0.036

.

Walking up more than 10 flights of stairs

.

.

0.3432

None, missing

2363

1.00 (.-.)

.

.

Short exposure

551

1.15 (0.95-1.39)

0.1561

.

Long exposure

276

1.07 (0.83-1.39)

0.5837

.

Sick leave for depression

.

.

0.1616

No

2832

1.00 (.-.)

.

.

Yes

358

1.18 (0.94-1.48)

0.1616

.

Pain intensity

.

.

<.0001

.

.

0.0004

Low, missing

1741

1.00 (.-.)

.

.

106

1.00 (.-.)

.

.

High

1449

1.46 (1.26-1.69)

<.0001

.

95

2.06 (1.15-3.69)

0.0154

.

No presentpain

175

0.71 (0.44-1.15)

0.1612

.

Past history of knee injury

.

.

<.0001

No, missing

1922

1.00 (.-.)

.

.

Yes

1268

1.50 (1.29-1.74)

<.0001

.

Self-assessed origin of knee pain

.

.

<.0001

Degenerative osteoarthritis

1349

1.91 (1.64-2.23)

<.0001

.

Other

1559

1.00 (.-.)

.

.

Not completed

282

0.80 (0.62-1.03)

0.0871

.

Pain in other areas at baseline

.

.

0.0001

.

.

0.7185

No pain

380

1.00 (.-.)

.

.

33

1.00 (.-.)

.

.

Hip pain

740

1.69 (1.31-2.18)

<.0001

.

110

1.37 (0.63-2.99)

0.4262

.

Pain in other areas

2070

1.27 (1.02-1.59)

0.0321

.

233

1.23 (0.59-2.55)

0.5785

.