Table 11 Univariate analysis comparing variables significantly associated with UNC against healthy participants
| Â | Healthy participants | Participants with UNC | P value |
|---|---|---|---|
n (%) | n (%) | ||
| Â | 4519 | 183 | Â |
Sex | |||
 Male | 2241(49.6) | 41(22.4) | P < 0.01* |
 Female | 2278(50.4) | 142(77.6) | |
Age | |||
 60–69 | 2243(49.6) | 91(49.7) | P = 0.981 |
  ≥ 70 | 2276(50.4) | 92(50.3) | |
Education (years) | |||
  ≤ 5 | 3040(67.3) | 154(84.2) | P < 0.01* |
  > 5 | 1479(32.7) | 29(15.8) | |
Current smoker | |||
 Yes | 1338(29.6) | 17(9.3) | P < 0.01* |
 No | 3181(70.4) | 166(90.7) | |
Currently drinks alcohol | |||
 Yes | 1164(25.8) | 23(12.6) | P < 0.01* |
 No | 3355(74.2) | 160(87.4) | |
Widowed/separated | |||
 Yes | 791(17.5) | 24(13.1) | P = 0.124 |
 No | 3728(82.5) | 159(86.9) | |
No social activities | |||
 Yes | 793(17.5) | 4(2.2) | P < 0.001* |
 No | 3726(82.5) | 179(97.8) | |
Comorbidities | |||
 Hypertension | 1520(33.6) | 70(38.3) | P = 0.196 |
2999(66.4) | 113(61.7) | ||
 Diabetes mellitus | 337(7.5) | 8(4.4) | P = 0.117 |
4182(92.5) | 175(95.6) | ||
 Heart disease | 631(14) | 44(24) | P < 0.01* |
3888(86) | 139(76) | ||