Table 1. Characteristics of cases and controls.
Variables | Cases | Controls | ||
n = 130 | % | n = 130 | % | |
Sex | ||||
Male | 71 | 54.6 | 71 | 54.6 |
Female | 59 | 45.4 | 59 | 45.4 |
Age (years) | ||||
≤40 | 26 | 20 | 24 | 18.5 |
41–50 | 28 | 21.5 | 28 | 21.5 |
51–60 | 44 | 33.9 | 44 | 33.8 |
>60 | 32 | 24.6 | 34 | 26.2 |
Mean (SD) | 51.9 (11.8) | 51.8 (11.9) | ||
Median (min:max) | 53 (16:79) | 53 (18:76) | ||
Marital status | ||||
Single | 3 | 2.3 | 12 | 9.2 |
Married | 113 | 86.9 | 99 | 76.2 |
Separated, widowed | 14 | 10.8 | 19 | 14.6 |
Occupation | ||||
Agriculture, farmer | 88 | 68.2 | 79 | 61.7 |
Office work, technical work | 14 | 10.9 | 15 | 11.7 |
Professional work | 12 | 9.3 | 19 | 14.9 |
Others | 15 | 11.6 | 15 | 11.7 |
Education | ||||
Illiterate | 4 | 3.1 | 4 | 3.1 |
Primary school | 98 | 75.4 | 96 | 73.8 |
Secondary school or higher | 28 | 21.5 | 30 | 23.1 |
Household income per year (Baht) | ||||
≤20 000 | 39 | 30 | 39 | 30 |
20 001–40 000 | 39 | 30 | 37 | 28.5 |
40 001–60 000 | 12 | 9.2 | 13 | 10 |
>60 000 | 40 | 30.8 | 41 | 31.5 |
Median (min:max) | 36 000 (6000:720 000) | 36 000 (4992:960 000) | ||
MTHFR C677T polymorphism | ||||
C/C | 104 | 80 | 94 | 72.3 |
C/T | 26 | 20 | 31 | 23.8 |
T/T | 0 | 0 | 5 | 3.9 |
MTHFR A1298C polymorphism | ||||
A/A | 43 | 33.1 | 54 | 41.5 |
A/C | 84 | 64.6 | 71 | 54.6 |
C/C | 3 | 2.3 | 5 | 3.9 |