Longitudinal follow-up of health effects among workers handling engineered nanomaterials: a panel study

Table 2 Demographic distribution in study population

Variables	Control (n=108)		RL1 (n=108)		RL2 & RL3 (n=98)
Variables	n	%	n	%	n	%	p-value^a
Age
≦36yrs	53	49.07	62	57.41	57	58.16	0.34
>36yrs	55	50.93	46	42.59	41	41.84
Gender
Female	29	26.85	23	21.30	18	18.37	0.33
Male	79	73.15	85	78.70	80	81.63
Ethnicity
Taiwanese or South Fujienese	85	78.70	89	82.41	73	74.49	0.36
Hakkanese	16	14.81	9	8.33	17	17.35
Others	7	6.48	10	9.26	8	8.16
Education
Senior high school	19	17.59	14	12.96	20	20.41	<0.01
College	62	57.41	47	43.52	33	33.67
Institute or higher education	27	25.00	47	43.52	45	45.92
Smoking
No	95	87.96	96	88.89	77	78.57	0.07
Yes	13	12.04	12	11.11	21	21.43
Alcohol Drinking
No	101	93.52	103	95.37	81	82.65	<0.01
Yes	7	6.48	5	4.63	17	17.35
Chewing betel nut
No	107	99.07	108	100.00	93	94.90	0.02
Yes	1	0.93	0	0.00	5	5.10

ISSN: 1476-069X