Table 2.
Sociodemographic characteristics of study sample.
| Variable | N | Case | Control | Mean difference (95% CI) | t statistica (df) | χ 2 statisticb (df) | P valued |
|---|---|---|---|---|---|---|---|
| Mean age at study entry in yearsa (SD) | |||||||
| Case | 49 | 11.8 (3.8) | — | 0.7 (0.8–2.2) | 0.871 (89) | — | 0.386 |
| Control | 42 | — | 12.5 (3.6) | ||||
| Genderb frequency (%) | |||||||
| Male | 37 | 20 (54) | 17 (46) | — | — | 0.00 (1) | 0.974 |
| Female | 54 | 29 (54) | 25 (46) | ||||
| Ethnicityb frequency (%) | |||||||
| Malay | 69 | 38 (55) | 31 (45) | — | — | 0.71 (1) | 0.678 |
| Others | 22 | 11 (50) | 11 (50) | ||||
| Mean family income in RMa (SD) | |||||||
| Case | 49 | 4383.7 (3287.6) | — | −138.4 (−1444.6, 1169.7) | −210 (89) | 0.834 | |
| Control | 42 | — | 4245.2 (2936.5) | ||||
| Parental marital statusc Frequency (%) | |||||||
| Married | 86 | 45 (52) | 41 (48) | — | — | 0.369 | |
| Single | 5 | 4 (80) | 1 (20) |
aIndependent t-test.
b χ 2 test for independence.
cFisher's exact test.
dSignificant P value <0.05.
SD: standard deviation; CI: confidence interval; RM: Ringgit Malaysia.