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Table 1 Characteristics of the study population and their association with MetS

From: Additive interaction of snoring and body mass index on the prevalence of metabolic syndrome among Chinese coal mine employees: a cross-sectional study

Characteristics Mets OR P value
Yes (1475) No (2319)
Gender, n (%)
 Men 1306 (88.54) 1891 (81.54) 1.75 (1.44,2.12) < 0.001*
 Women 169 (11.46) 428 (18.46)   
Age    1.42 (1.31,1.55) < 0.001*
  ≤ 35 296 (20.07) 679 (29.28)   
 35–45 502 (34.03) 855 (36.87)   
  ≥ 45 677 (45.90) 785 (33.85)   
Monthly income (CNY), n (%)    0.91 (0.84,0.99) 0.039*
  ≤ 4000 416 (28.20) 573 (24.71)   
 4000–6000 625 (42.37) 1025 (44.20)   
  ≥ 6000 434 (29.42) 721 (31.09)   
Marital status, n (%)
 Single 36 (2.44) 142 (6.12) 1 (reference)  
 Married 1415 (95.93) 2136 (92.11) 2.61 (1.80,3.79) < 0.001*
 Divorced 24 (1.63) 41 (1.77) 2.31 (1.24,4.30) 0.008*
Educational level, n(%)
 Junior high school or below 420 (28.47) 627 (27.04) 1 (reference)  
 Bachelor degree or above 172 (11.66) 280 (12.07) 0.92 (0.73,1.15) 0.453
 Junior college and senior high school 883 (59.86) 1412 (60.89) 0.93 (0.80,1.08) 0.366
Work type, n (%)
 Heavy physical 316 (21.42) 654 (28.20) 1 (reference)  
 Light physical 795 (53.90) 1076 (46.40) 1.53 (1.30,1.80) < 0.001*
 Mental labor 364 (24.68) 589 (25.40) 1.28 (1.06,1.54) 0.010*
Current smoking, n (%)
 Yes 875 (59.32) 1293 (55.76) 1.16 (1.01,1.32) 0.031*
 No 600 (40.68) 1026 (44.24)   
Alcohol consumption, n (%)
 Yes 676 (45.83) 886 (38.21) 1.37 (1.20,1.56) < 0.001*
 No 799 (54.17) 1433 (61.79)   
Physical activity level, n (%)
 Inactive 134 (9.08) 161 (6.94) 1 (reference)  
 Minimally Active 452 (30.64) 657 (28.33) 0.83 (0.64,1.07) 0.149
 Health-enhancing physical activity 889 (60.27) 1501 (64.73) 0.71 (0.56,0.91) 0.006*
Workplace
 Underground front-line 237 (16.07) 525 (22.64) 1 (reference)  
 Underground auxiliary 538 (36.47) 792 (34.15) 1.51 (1.25,1.82) < 0.001*
 Ground worker 421 (28.54) 561 (24.19) 1.66 (1.36,2.03) < 0.001*
 Office worker 279 (18.91) 441 (19.01) 1.56 (1.21,2.00) 0.139
Snoring, n (%)
 Never 375 (25.42) 960 (41.40) 1 (reference)  
 Occasionally 556 (37.69) 864 (37.26) 1.65 (1.40,1.93) < 0.001*
 Habitually 544 (36.88) 495 (21.35) 2.81 (2.37,3.34) < 0.001*
BMI (kg/ m2), n (%)
  < 24 1305 (56.27) 269 (18.24)   
  ≥ 24 1014 (43.73) 1206 (81.76) 5.77 (4.94,6.74) < 0.001*
  1. MetS metabolic syndrome
  2. *is used to highlight statistically significant (p < 0.05) findings