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. 2020 Jul 30;32:e29. doi: 10.35371/aoem.2020.32.e29

Table 1. General characteristics and distribution of study participants according to impaired fasting glucose (n = 2,168).

Variables Total (n = 2,168) Impaired fasting glucose
Men (n = 796) Women (n = 1,372)
No (n = 551) Yes (n = 245) p-value No (n = 1,091) Yes (n = 281) p-value
Age (years) < 0.001a < 0.001a
< 30 417 166 (96.5) 6 (3.5) 234 (95.5) 11 (4.5)
30–39 330 105 (84.9) 23 (15.1) 177 (87.9) 25 (12.4)
40–49 419 74 (64.6) 45 (35.4) 241 (81.3) 59 (18.7)
50–59 466 77 (54.9) 62 (45.1) 252 (77.2) 75 (2.8)
≥ 60 536 129 (52.1) 109 (47.9) 187 (64.1) 111 (35.9)
Education < 0.001a < 0.001a
≤ Elementary school 357 56 (49.8) 46 (50.2) 160 (64.8) 95 (35.2)
Middle school 254 61 (59.0) 44 (41.0) 106 (74.6) 43 (25.4)
High school 859 244 (77.5) 95 (22.5) 437 (84.1) 83 (15.9)
≥ College 697 190 (80.6) 60 (19.4) 388 (89.0) 59 (11.0)
Income (month) 0.163 < 0.05
< 1 million won 238 57 (83.3) 16 (16.7) 111 (72.8) 54 (27.2)
100–200 353 96 (67.4) 53 (32.6) 149 (75.7) 55 (24.3)
200–300 318 91 (73.0) 47 (27.0) 143 (82.0) 37 (18.0)
≥ 3 million won 1,259 307 (74.8) 129 (25.2) 688 (85.1) 135 (14.9)
BMI 0.71 < 0.001a
< 25 1,525 376 (76.4) 141 (23.6) 848 (86.2) 160 (13.8)
≥ 25 642 175 (69.6) 104 (30.4) 243 (70.4) 120 (29.6)
HTN < 0.001a < 0.001a
Yes 517 124 (53.9) 115 (46.1) 175 (67.4) 103 (32.6)
No 1,650 427 (81.0) 130 (19.0) 915 (85.2) 178 (14.8)
Hypercholesterolemia 0.84 < 0.001a
Yes 395 80 (66.3) 47 (33.7) 191 (71.9) 77 (28.1)
No 1,773 471 (75.2) 198 (24.8) 900 (84.4) 204 (15.6)
Alcohol 0.114 0.685
≤ Once a month 1,155 200 (77.6) 75 (22.4) 694 (81.9) 186 (18.1)
≥ Twice a month 1,008 351 (72.2) 170 (27.8) 393 (82.8) 94 (17.2)
Smoking 0.312 0.286
Never-smoker or ex-smoker 1,758 322 (72.5) 161 (27.5) 1,020 (82.6) 255 (17.4)
Current smoker 404 228 (76.0) 84 (24.0) 67 (78.3) 25 (21.7)
Occupation < 0.001a < 0.001a
Non-physical 1,242 268 (83.8) 71 (16.2) 756 (85.9) 147 (14.1)
Physical 923 283 (65.5) 173 (34.5) 333 (73.6) 134 (26.4)
Working hour 0.288 0.214
≤ 52 hours 1,860 424 (75.1) 183 (24.9) 999 (82.7) 254 (17.3)
> 52 hours 307 127 (70.7) 62 (29.3) 91 (77.8) 27 (22.2)
Working type < 0.05a 0.874
Daytime work 1,738 418 (71.5) 210 (28.5) 879 (82.1) 231 (17.9)
Shift work 427 133 (83.3) 34 (16.7) 210 (82.6) 50 (17.4)

BMI: body mass index, HTN: hypertension.

aCalculated by χ2 test.