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Table 1 Baseline Characteristics of participants (n = 1068)

From: Total polyunsaturated fatty acid intake and the risk of non-alcoholic fatty liver disease in Chinese Han adults: a secondary analysis based on a case–control study

Group Non-NAFLD NAFLD P-value
Number 534 534  
MUFA intake (g/day) 31.16 (8.59) 34.12 (9.10)  < 0.001
Total PUFA intake (g/day) 23.30 (4.58) 25.93 (4.86)  < 0.001
Nut intake (g/day) 2.86 (1.22–8.98) 3.15 (1.50–8.80) 0.743
Energy intake (kcal/day) 2167.63 (598.59) 2263.95 (617.49) 0.010
Sex (n, %)    1.000
 Men 364 (68.16%) 364 (68.16%)  
 Women 170 (31.84%) 170 (31.84%)  
Age (n, %)    0.734
 < 40 year 138 (25.84%) 140 (26.22%)  
 40–60 334 (62.55%) 340 (63.67%)  
 ≥ 60 62 (11.61%) 54 (10.11%)  
Education level (n, %)    0.332
 Primary school and less than 49 (9.18%) 40 (7.49%)  
 Junior middle and high school 202 (37.83%) 223 (41.76%)  
 Junior college or above 283 (53.00%) 271 (50.75%)  
Marital status (n,%)    0.192
 Single 62 (11.61%) 49 (9.18%)  
 Married or other 472 (88.39%) 485 (90.82%)  
BMI (n, %)     < 0.001
 < 18.5 kg/m2 20 (3.75%) 3 (0.56%)  
 18.5–24.0 382 (71.54%) 179 (33.52%)  
 ≥ 24.0 132 (24.72%) 352 (65.92%)  
Income (n, %)    0.448
 < 2000 yuan/month 35 (6.55%) 32 (5.99%)  
 2000–3000 174 (32.58%) 157 (29.40%)  
 ≥ 3000 325 (60.86%) 345 (64.61%)  
Smoking status (n, %)    0.284
 Never smoker 383 (71.72%) 367 (68.73%)  
 Smoker 151 (28.28%) 167 (31.27%)  
Tea-drinking status (n, %)    0.029
 No drinking 234 (43.82%) 199 (37.27%)  
 Drinking 300 (56.18%) 335 (62.73%)  
Occupation (n, %)    0.187
 Mental labour 152 (28.46%) 158 (29.59%)  
 Physical labour 136 (25.47%) 111 (20.79%)  
 Other 246 (46.07%) 265 (49.63%)  
Physical exercise (n, %)    0.046
 Light 156 (29.21%) 194 (36.33%)  
 Moderate 164 (30.71%) 147 (27.53%)  
Severe 214 (40.07%) 193 (36.14%)  
History of hyperlipidemia (n, %)    0.661
 No 508 (95.13%) 511 (95.69%)  
 Yes 26 (4.87%) 23 (4.31%)  
History of diabetes (n, %)    0.241
 No 519 (97.19%) 512 (95.88%)  
 Yes 15 (2.81%) 22 (4.12%)  
History of hypertension (n, %)     < 0.001
 No 436 (81.65%) 375 (70.22%)  
 Yes 98 (18.35%) 159 (29.78%)  
  1. NAFLD non-alcoholic fatty liver, BMI body mass index, MUFA monounsaturated fatty acid, PUFA polyunsaturated fatty acid
  2. Medians (IQRs)
  3. Mean (SD)