Table V.

Crab pot and gill net fishermen: Unadjusted rate ratio and 95% confidence intervals^† for the occurrence of LBP that interrupted or limited work for self-reported fishing task frequency (n=89, 313 visits)

	Severe LBP Occurrences	Days at risk	RR† (95% CI)	CLR
Drive boat	29	38,945	1.2 (0.4, 3.4)	7.9
Loading bait or supplies
Without mechanical assistance	30	42,424	0.9 (0.3, 2.9)	9.6
With mechanical assistance (e.g., dolly or lift)	6	5959	1.3 (0.4, 4.0)	9.5
Pull in gear (hook/pull in pot or pull in net)	28	40,837	0.9 (0.3, 2.3)	6.9
Run pot puller or net reel	19	14,719	2.5 (1.2, 5.5)	4.7
Empty gear (shake crab pot or pick fish from net)	29	41,061	0.8 (0.3, 2.3)	7.7
Bait crab pot (crab pot only)	26	33,621	1.1 (0.5, 2.4)	4.6
Set gear (toss/push pot or run out net or toss net overboard)	29	39,732	1.0 (0.4, 2.8)	7.4
Sort catch on the boat	23	25,651	1.9 (0.8, 4.3)	5.4
Ice down catch (gill net only)	17	26,035	1.2 (0.6, 2.7)	4.7
Unload catch and/or supplies
Without mechanical assistance	30	38,987	1.5 (0.5, 4.6)	10.1
With mechanical assistance (e.g., dolly or lift)	9	5799	2.5 (1.1, 5.6)	5.1
Sort catch at the fish house (crab pot only)	13	15,413	1.1 (0.5, 2.7)	5.8
Clean boat	29	40,398	1.0 (0.4, 2.8)	7.9
Perform routine maintenance on boat or gear	28	36,047	1.3 (0.5, 3.3)	6.6

^†Poisson regression estimates are adjusted for multiple visits per subject with GEE

CLR, confidence limit ratio, upper confidence limit divided by the lower confidence limit [Poole 2001]

Exposed (1): fishermen who perform task over half the time; Referent (0): fishermen who perform task half the time or less