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Table 3 Distribution of workers with functional dyspepsia by characteristics (n = 901)

From: Relationship between job stress and functional dyspepsia in display manufacturing sector workers: a cross-sectional study

  Male (n = 561) Female (n = 340)
FD(−) N FD(+) N p-value FD(−) N FD(+) N p-value
Age (years)
  < 20 22 (91.7%) 2 (8.3%) 0.456 48 (90.6%) 5 (9.4%) 0.967
 21–25 5 (100%) 0 (0%)   106 (92.2%) 9 (7.8%)  
 26–30 48 (90.6%) 5 (9.4%)   108 (90.8%) 11 (9.2%)  
 31–35 302 (95.3%) 15 (4.7%)   42 (93.3%) 3 (6.7%)  
 36–40 156 (96.3%) 6 (3.7%)   7 (87.5%) 1 (12.5%)  
Body mass index
  < 25 kg/m2 297 (96.1%) 12 (3.9%) 0.182 252 (91.3%) 24 (8.7%) 0.820
  ≥ 25 kg/m2 236 (93.7%) 16 (6.3%)   59 (92.2%) 5 (7.8%)  
Regular exercise (times / week)
 0 194 (95.1%) 10 (4.9%) 0.997 203 (92.3%) 17 (7.7%) 0.617
 1–2 227 (95.0%) 12 (5.0%)   81 (91.0%) 8 (9.0%)  
  ≥ 3 112 (94.9%) 6 (5.1%)   27 (87.1%) 4 (12.9%)  
Smoking
 Non-smoker 184 (93.9%) 12 (6.1%) 0.662 262 (91.9%) 23 (8.1%) 0.228
 Past smoker 126 (95.5%) 6 (4.5%)   26 (86.7%) 5 (16.1%)  
 Current smoker 223 (95.7%) 10 (4.3%)   23 (95.8%) 1 (4.2%)  
Alcohol consumption (times / week)
 0 104 (97.2%) 3 (2.8%) 0.506 116 (92.1%) 10 (7.9%) 0.362
 1–2 315 (94.6%) 18 (5.4%)   161 (89.9%) 18 (10.1%)  
  ≥ 3 114 (94.2%) 7 (5.8%)   34 (97.1%) 1 (2.9%)  
Duration of Shift work (years)
  < 5 42 (95.5%) 2 (4.5%) 0.956# 72 (91.1%) 7 (8.9%) 0.863
 5–9 179 (94.2%) 11 (5.8%)   141 (92.8%) 11 (7.2%)  
 10–14 254 (95.1%) 13 (4.9%)   91 (90.1%) 10 (9.9%)  
  ≥ 15 58 (96.7%) 2 (3.3%)   7 (87.5%) 1 (12.5%)  
Weekly working hours (hours / week)
  ≤ 40 81 (97.6%) 2 (2.4%) 0.444 34 (94.4%) 2 (5.6%) 0.148
 41–51 363 (94.8%) 20 (5.2%)   233 (92.5%) 19 (7.5%)  
  ≥ 52 89 (93.7%) 6 (6.3%)   44 (84.6%) 8 (15.4%)  
ISI-K index (score)
 Non-significant insomnia (0–15) 509 (96.0%) 21 (4.0%) < 0.001* 289 (92.6%) 23 (7.4%) 0.011*
 Clinically significant insomnia (16–28) 24 (77.4%) 7 (22.6%)   22 (78.6%) 6 (21.4%)  
  1. FD(−) N the number of functional dyspepsia-negative group, FD(+) N the number of functional dyspepsia-positive group, ISI-K Korean version of insomnia severity index
  2. p-value: p-value of chi-square tests; *p < 0.05; #p-value of fisher’s exact test