Table 3 Effects of different shift patterns on blood lipid levels in Karamay, Xinjiang from 2013 to 2019

TC (\(\overline{\boldsymbol{X}}\) ±SD, mmol/L)

Fixed day shift

4.539 ± 0.703

4.810 ± 0.738a

0.270 ± 0.711a

< 0.001

Two shifts

4.515 ± 0.699

5.042 ± 1.009b

0.527 ± 1.025bc

< 0.001

Three shifts

4.571 ± 0.708

5.052 ± 0.961b

0.481 ± 0.910b

< 0.001

Four shifts

4.608 ± 0.729

5.268 ± 0.942c

0.660 ± 0.994c

< 0.001

P

0.172

< 0.001

< 0.001

–

TG (\(\overline{\boldsymbol{X}}\) ±SD, mmol/L)

Fixed day shift

1.142 ± 0.458

1.348 ± 0.790

0.206 ± 0.779

< 0.001

Two shifts

1.150 ± 0.459

1.410 ± 1.892

0.260 ± 1.898

0.003

Three shifts

1.158 ± 0.494

1.352 ± 0.909

0.237 ± 0.777

< 0.001

Four shifts

1.125 ± 0.478

1.409 ± 1.160

0.284 ± 1.151

< 0.001

P

0.690

0.725

0.069

–

HDL-C (\(\overline{\boldsymbol{X}}\) ±SD, mmol/L)

Fixed day shift

1.373 ± 0.248

1.301 ± 0.281

−0.072 ± 0.287

< 0.001

Two shifts

1.358 ± 0.241

1.271 ± 0.260

−0.086 ± 0.272

< 0.001

Three shifts

1.389 ± 0.269

1.311 ± 0.305

−0.078 ± 0.295

< 0.001

Four shifts

1.394 ± 0.261

1.312 ± 0.301

−0.082 ± 0.318

< 0.001

P

0.110

0.104

0.846

–

LDL-C (\(\overline{\boldsymbol{X}}\) ±SD, mmol/L)

Fixed day shift

2.660 ± 0.621

2.730 ± 0.615a

0.069 ± 0.617a

0.001

Two shifts

2.613 ± 0.592

2.796 ± 0.738ab

0.184 ± 0.745b

< 0.001

Three shifts

2.687 ± 0.632

2.864 ± 0.753b

0.177 ± 0.728b

< 0.001

Four shifts

2.691 ± 0.634

2.914 ± 0.768b

0.223 ± 0.794b

< 0.001

P

0.197

< 0.001

0.001

–