## 3 Results and Discussion
### Differences in the Dyslipidemia Prevalence by Subject Characteristics by Age
#### 3.1.2 Differences by Health Behavior and Eating Habits
\begin{table}
\begin{tabular}{l l l l l l l l l} \hline \hline
**Variables and Categories** & **19–34 (\%)** & \(p\) & **35–49 (\%)** & \(p\) & **50–64 (\%)** & \(p\) & \(\geq\)65 (\%)** & \(p\) & **Rao-Scott \(\chi^{2}\)** \\ \hline Gender & & & & & & & & & \\ Male & 1110 (48.1) & 0.350 & 1428 (42.9) & 0.390 & 1544 (43.7) & 0.005 & 1521 (53.3) & \textless{}0.001 & (\textless{}0.004) \\ Female & 1200 (51.9) & & 1902 (57.1) & & 1989 (56.3) & & 1334 (46.7) & & \\ \hline Marital status & & & & & & & & & \\ Married & 512 (22.2) & \textless{}0.001 & 2925 (87.8) & \textless{}0.001 & 3396 (96.1) & \textless{}0.001 & 2833 (99.2) & \textless{}0.001 & (\textless{}0.001) \\ Not married & 1798 (77.8) & & 405 (12.2) & & 137 (3.9) & & 22 (0.8) & & \\ \hline Household income & & & & & & & & & \\ Low & 416 (18.0) & \textless{}0.001 & 533 (16.0) & \textless{}0.001 & 880 (23.5) & \textless{}0.001 & 1815 (63.6) & \textless{}0.001 & (\textless{}0.001) \\ Middle & 506 (21.9) & & 824 (24.7) & & 735 (20.8) & & 445 (15.6) & & \\ High & 1388 (60.1) & & 1973 (99.2) & & 1968 (55.7) & & 595 (20.8) & & \\ \hline Education level & & & & & & & & & \\ \(\leq\)Middle school graduate & 31 (1.3) & \textless{}0.001 & 97 (2.9) & \textless{}0.001 & 897 (25.4) & \textless{}0.001 & 1918 (67.2) & \textless{}0.001 & (\textless{}0.001) \\ High school graduate & 1040 (45.0) & & 1057 (31.7) & & 1487 (42.1) & & 597 (20.9) & & \\ \(\geq\)College graduate & 1239 (53.6) & & 2176 (65.3) & & 1149 (32.5) & & 340 (11.9) & & \\ \hline Subjective health status & & & & & & & & \\ Good & 967 (41.9) & \textless{}0.001 & 1095 (32.9) & \textless{}0.001 & 1027 (29.1) & \textless{}0.001 & 742 (26.0) & \textless{}0.001 & (\textless{}0.001) \\ Normal & 1053 (45.6) & & 1781 (53.5) & & 1827 (51.7) & & 1358 (47.6) & & \\ Bad & 290 (12.6) & & 454 (13.6) & & 679 (19.2) & & 755 (26.4) & & \\ \hline BMI & & & & & & & & & \\ Underweight & 199 (8.6) & \textless{}0.001 & 130 (3.9) & 0.006 & 82 (2.3) & \textless{}0.001 & 76 (2.7) & \textless{}0.001 & (\textless{}0.001) \\ Healthy weight & 1023 (44.3) & & 1277 (38.3) & & 1230 (34.8) & & 920 (32.2) & & \\ Obesity & 1088 (47.1) & & 1923 (57.7) & & 2221 (62.9) & & 1859 (65.1) & & \\ \hline Family history & & & & & & & & & \\ No & 1578 (68.3) & \textless{}0.001 & 1988 (59.7) & \textless{}0.001 & 2084 (59.0) & \textless{}0.001 & 1551 (54.3) & \textless{}0.001 & (\textless{}0.001) \\ Yes & 732 (31.7) & & 1342 (40.3) & & 1449 (41.0) & & 1304 (45.7) & & \\ \hline Dyslipidemia & & & & & & & & \\ No & 2288 (99.0) & \textless{}0.001 & 3052 (91.7) & \textless{}0.001 & 2448 (69.3) & \textless{}0.001 & 1732 (60.7) & \textless{}0.001 & (\textless{}0.001) \\ Yes & 22 (1.0) & & 278 (8.3) & & 1085 (30.7) & & 1123 (39.3) & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Differences by general characteristics and health status of the selected sample. Table 3 shows the difference in the dyslipidemia prevalence according to the subjects' eating habits. In terms of the breakfast frequency, a frequency of \"5-7 times a week\" was the highest in those aged 65 or older, at 91.8%, while a frequency of \"almost never\" was the highest in those aged 19-35, at 36.3%. In terms of the lunch and dinner frequency, a frequency of \"5-7 times a week\" was the highest in all of the age groups. In terms of the dining out frequency, a frequency of \"almost never\" increased with age, and the highest frequency was \"1-4 times a week\" in all of the age groups. In terms of dietary habit practices, the breakfast frequency (\(\chi^{2}\) = 215.485, \(p\) < 0.001), lunch frequency (\(\chi^{2}\) = 7.988, \(p\) < 0.001), dinner frequency (\(\chi^{2}\) = 18.498, \(p\) < 0.001), and dining out frequency (\(\chi^{2}\) = 162.134, \(p\) < 0.001) showed significant differences by age in terms of the relationship with the presence or absence of dyslipidemia.