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. 2019 Sep 22;16(19):3540. doi: 10.3390/ijerph16193540

Table 2.

Comparisons of the between periodontitis and non-periodontitis groups.

Parameters (n = 738) Periodontitis (n = 492) Non-Periodontitis (n = 246) p Value
n (%)
Mean ± SD
n (%)
Mean ± SD
Age (y) 43 ± 10.1 34.9 ± 8.9 <0.001 1
Gender (Male) 462 (93.9) 184 (74.8) <0.001 2
Daily flossing (Yes) 64 (13.0) 31 (12.6) 0.876 2
Regular dental checkup (Yes) 70 (14.2) 37 (15.0) 0.767 2
BMI (kg/m2)
<25 336 (68.3) 209 (85.0) <0.001 2
≥25 156 (31.7) 37 (15.0)
Sleeping duration (daily)
≥6 h 418 (85.0) 213 (86.6) 0.554 2
<6 h 74 (15.0) 33 (13.4)
Current smoker (Yes) 161 (32.7) 45 (18.3) <0.001 2
Daily alcohol drinking (Yes) 104 (21.1) 26 (10.6) <0.001 2
Monthly overtime work
(≥40 h) 145 (29.5) 42 (17.1) <0.001 2
Worker type
Skilled worker 245 (49.8) 89 (36.2) <0.001 2
Office worker 247 (50.2) 157 (63.8)
Low stress 431 (87.6) 219 (89.0) <0.001 2
High stress-High coping 17 (3.5) 21 (8.5)
High stress-Low coping 44 (8.9) 6 (2.5)

BMI, body mass index. SD, standard deviation. 1 Mann–Whitney U test, and 2 chi-squared test.