Table 2.

Blood lead level of respondents according to years of job, daily working hour, and personal habits.

Factors	Frequency	Mean μgm/dL	Std. deviation
(1) Years of job
Up to 5 years	40	61.05	20.81
>5–10 years	30	73.29	31.26
10.1–15 years	27	60.50	24.83
Above 15 years	21	67.87	29.95
(2) Shift of work in hour
8	55	59.82	20.20
9	29	66.00	29.35
10	15	69.36	24.17
11	13	69.91	32.68
12	4	81.10	33.16
15	2	111.05	69.22
(3) PPE use
Yes	51	61.95*	23.93
No	67	67.76*	28.34
(4) Smoking habit
Yes	57	71.50**	29.40
No	61	59.35**	22.29
(5) Bath regularly after daily work
Yes	38	55.97***	24.24
No	80	69.66***	26.57

*t = 1.178; P = 0.241, **t = 2.554; P = 0.012; ***t = −2.81; P = 0.008.