Table 5. Association of shift time and commuter time.

	0-15 min	16-30 min	31-45 min	46-60 min	> 61 min	Total
8 hours	38	33	9	5	0	85
9 hours	18	17	1	1	0	37
10 hours	54	59	21	12	2	148
12 hours	53	39	34	30	9	165
Total	163	148	65	48	11	435