Table 1.

Demographic data

	Early-onset depression	Late-onset depression	Normal controls	P value
Age (years)	65.4 ± 7.8	69.4 ±7.6	65.4 ±6.1	NS
Educational level (years)	9.8 ± 4.3	9.8 ±4.3	12.5 ±3.8	NS
MMSE	26.4 ± 3.5	25.8 ±4.5	29.0 ±1.0	0.015*

Notes: Values expressed are mean ± standard deviation.

^*Significant differences: P < 0.05. NS: nonsignificant differences (P > 0.05).

Abbreviation: MMSE, Mini-Mental State Examination.