Table 7.

Five major symptoms according to the age of onset

Age of onset	No.	Levodopa	Hoehn and Yahr	Tremor		Rigidity		Bradykinesia		Gait disturbance		Retropulsion
39 or younger	22	573 ± 291	2.32 ± 0.70	7	31.8%	9	40.9%	17	77.3%	17	77.3%	3	13.6%
40–49 years	52	679 ± 311	2.40 ± 0.63	6	11.5%	20	38.5%	41	78.8%	37	71.1%	8	15.4%
50–59 years	147	618 ± 319	2.56 ± 1.00	17	11.6%	67	45.6%	122	83.0%	113	76.9%	44	29.9%
60–69 years	172	592 ± 291	2.66 ± 1.05	34	19.8%	66	38.4%	142	82.6%	136	79.1%	55	32.0%
70 or older	105	509 ± 242	3.00 ± 1.00	16	15.2%	45	42.9%	99	94.3%	97	92.4%	56	53.3%
Total	498	613 ± 297	2.66 ± 0.99	80	16.1%	207	41.6%	421	84.5%	400	80.3%	166	33.3%

Levodopa dose and Hoehn and Yahr indicate mean ± standard deviation in all the patients in respective classes