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Table 1 Characteristics of the study population

From: Predictors of elevated capillary blood glucose in overweight railway French employees: a cross-sectional analysis

Characteristics Total Capillary blood glucose
Normal (< 7 mmol/L)
n (%)
Elevated (≥ 7 mmol/L)
n (%)
p value
(n = 2248) 1798 (80.0) 450 (20.0)
Sex
 Women 416 (18.5) 363 (87.3) 53 (12.7) < 0.001
 Men 1832 (81.5) 1435 (78.3) 397 (21.7)  
Age (years)
 < 30 163 (7.2) 137 (84.0) 26 (16.0) < 0.001
 31–39 657 (29.2) 562 (85.5) 95 (14.5)  
 40–49 716 (31.9) 561 (78.3) 155 (21.7)  
 ≥ 50 712 (31.7) 538 (75 .6) 174 (24.4)  
Marital status
 Married/living with a partner 1916 (85.2) 1535 (80.1) 381 (19.9) 0.71
 Single 332 (14.8) 263 (79.2) 69 (20.8)  
Professional grade
 Low 946 (42.1) 742 (78.4) 204 (21.6) 0.28
 Intermediate 695 (30.9) 561 (80.7) 134 (19.3)  
 High 607 (27.0) 495 (81.6) 112 (18.4)  
Job sector
 Administrative staff 281 (12.5) 231 (82.2) 50 (17.8) 0.76
 Freight 117 (5.2) 96 (82.0) 21 (18.0)  
 Infrastructure 785 (34.9) 625 (79.6) 160 (20.4)  
 Material 340 (15.1) 263 (75.4) 77 (22.6)  
 Traction 238 (10.6) 195 (81.9) 43 (18.1)  
 Transportation 450 (20.0) 358 (79.6) 92 (20.4)  
 Security 37 (1.7) 30 (81.1) 7 (18.9)  
Job seniority (years)
 ≤ 10 465 (20.7) 391 (84.1) 74 (15.9) < 0.01
 11–20 704 (31.3) 577 (82.0) 127 (18.0)  
 21–30 596 (26.5) 465 (78.0) 131 (22.0)  
 ≥ 30 483 (21.5) 365 (75.6) 118 (24.4)  
Work schedule
 Day only 1359 (60.5) 1087 (80.0) 272 (20.0) 0.48
 Shift work 517 (23.0) 422 (81.6) 95 (18.4)  
 Rotating shift work 338 (15.0) 264 (78.1) 74 (21.9)  
 Night only 34 (1.5) 25 (73.5) 9 (26.5)  
BMI (kg/m2)
 25 to 27.4 1111 (49.4) 906 (81.6) 205 (18.4) 0.07
 27.5 to 29.9 1137 (50.6) 892 (78.5) 245 (21.6)  
Waist circumference
 Normal 1444 (64.2) 1160 (80.3) 284 (19.7) 0.58
 Elevated 804 (35.8) 638 (79.4) 166 (20.7)  
Blood pressure
 Normal 1606 (71.4) 1318 (82.1) 288 (17.9) < 0.001
 High 642 (28.6) 480 (74.8) 162 (25.2)  
Risk of sleep apnoea
 Low 1868 (83.1) 1505 (80.6) 363 (19.4) 0.12
 High 380 (16.9) 293 (77.1) 87 (22.9)  
Physical activity
 Inactive 715 (31.8) 577 (80.7) 138 (19.3) 0.72
 Moderately inactive 468 (20.8) 367 (78.4) 101 (21.6)  
 Moderately active 566 (25.2) 450 (79.5) 116 (20.5)  
 Active 499 (22.2) 404 (81.0) 95 (19.0)  
Diet
Cereals/bread
 Never or less than 3 times per week 172 (7.6) 135 (78.5) 37 (21.5) 0.69
 3 to 6 times per week 350 (15.6) 287 (82.0) 63 (18.0)  
 1 or 2 times per day 1119 (49.8) 896 (80.1) 223 (19.9)  
 At least, three times per day 607 (27.0) 480 (79.1) 127 (20.9)  
Rice/pasta
 Never or less than 3 times per week 282 (12.5) 224 (79.4) 58 (20.6) 0.79
 3 to 6 times per week 1350 (60.1) 1083 (80.2) 267 (19.8)  
 1 or 2 times per day 599 (26.6) 479 (80.0) 120 (20.0)  
 At least, three times per day 17 (0.8) 12 (70.6) 5 (29.4)  
Dairy products
 Never or less than 3 times per week 216 (9.6) 172 (79.6) 44 (20.4) 0.65
 3 to 6 times per week 530 (23.6) 427 (80.6) 103 (19.4)  
 1 or 2 times per day 1254 (55.8) 994 (79.3) 260 (20.7)  
 At least, three times per day 248 (11.0) 205 (82.7) 43 (17.3)  
Fruits and vegetables
 Never or less than 3 times per week 192 (8.5) 149 (77.6) 43 (22.4) 0.24
 3 to 6 times per week 923 (41.1) 725 (78.6) 198 (21.4)  
 1 or 2 times per day 943 (41.9) 765 (81.1) 178 (18.9)  
 At least, three times per day 190 (8.5) 159 (83.7) 31 (16.3)  
Meat and poultry, eggs and fish
 Never or less than 3 times per week 125 (5.5) 93 (74.4) 32 (25.6) 0.33
 3 to 6 times per week 822 (36.6) 652 (79.3) 170 (20.7)  
 1 or 2 times per day 1261 (56.1) 1021 (81.0) 240 (19.0)  
 At least, three times per day 40 (1.8) 32 (80.0) 8 (20.0)  
Ready-to-eat food
 Never or less than 3 times per week 1797 (79.9) 1437 (80.0) 360 (20.0) 0.12
 3 to 6 times per week 395 (17.6) 322 (81.5) 73 (18.5)  
 1 or 2 times per day 56 (2.5) 39 (69.6) 17 (30.4)  
Sugary food
 Never or less than 3 times per week 874 (38.9) 719 (82.3) 155 (17.7) < 0.05
 3 to 6 times per week 840 (37.4) 674 (80.2) 166 (19.8)  
 Once per day or more 534 (23.7) 405 (75.8) 129 (24.2)  
You add to your meals…
Salt
 Never/sometimes 1316 (58.5) 1052 (79.9) 264 (20.1) 0.95
 Often/always 932 (41.5) 746 (80.0) 186 (20.0)  
You drink…
Sugary drinks
 Never or less than 3 times per week 718 (31.9) 590 (82.2) 128 (17.8) < 0.05
 3 to 6 times per week 458 (20.4) 367 (80.1) 91 (19.9)  
 1 or 2 times per day 674 (30.0) 544 (80.7) 130 (19.3)  
 At least, three times per day 398 (17.7) 297 (74.6) 101 (25.4)  
Alcoholic beverages
 Never or less than 3 times per week 1513 (67.3) 1231 (81.4) 282 (18.6) < 0.05
 3 times or more per week 735 (32.7) 567 (77.1) 168 (22.9)