Female (N = 860)

Working period-adjusteda

Multivariable-adjustedb

Odds ratio

95% Confidence intervals

P value

Odds ratio

95% Confidence intervals

P value

Body sites

Minimum

Maximum

Minimum

Maximum

Eyes

1.950

1.440

2.650

<0.001

1.560

1.130

2.160

0.007

Lower extremities

1.740

1.240

2.440

0.001

1.440

1.000

2.060

0.048

Head

1.780

1.320

2.390

<0.001

1.400

1.020

1.920

0.037

Upper back

1.810

1.260

2.600

0.001

1.300

0.873

1.940

0.195

Neck-shoulder

1.700

1.190

2.430

0.004

1.250

0.852

1.840

0.253

Upper extremities

1.630

1.090

2.430

0.017

1.200

0.786

1.840

0.394

Low back

1.430

1.050

1.950

0.023

1.010

0.718

1.430

0.942

Male (N = 1589)

School type-adjustedc

Multivariable-adjustedd

Odds ratio

95% Confidence intervals

P value

Odds ratio

95% Confidence intervals

P value

Body sites

Minimum

Maximum

Minimum

Maximum

Eye

2.020

1.590

2.560

<0.001

1.550

1.190

2.020

0.001

Upper extremities

2.030

1.490

2.770

<0.001

1.500

1.060

2.120

0.022

Head

1.950

1.500

2.520

<0.001

1.460

1.100

1.930

0.009

Upper back

2.010

1.500

2.710

<0.001

1.460

1.040

2.040

0.027

Neck-shoulder

1.790

1.400

2.280

<0.001

1.270

0.965

1.670

0.089

Low back

1.320

1.040

1.680

0.022

0.952

0.725

1.250

0.723

Lower extremities

1.420

1.060

1.910

0.019

0.909

0.642

1.290

0.591