Table 2.

Comparison of the associations with occupational group and occupational activities between cases with severe lumbar spinal stenosis and controls without

				Model 1			Model 2			Model 3
	Total N	Cases	Controls	OR	95%CIs	P	OR	95%CIs	P	OR	95%CIs	P
Occupational group
Clerical/technical experts	197	57	140	Baseline			Baseline			Baseline
Agricultural/Fishermen	105	47	58	1.99	(1.22,3.26)	0.01	1.37	(0.82,2.30)	0.23	1.35	(0.79,2.28)	0.27
Factory/construction	48	22	26	2.08	(1.09,3.96)	0.03	1.73	(0.89,3.35)	0.11	1.72	(0.88,3.34)	0.11
Clinical/Housekeepers/Shop assistants/Hairdressers/Dressmakers	207	63	144	1.07	(0.70,1.65)	0.74	1	(0.65,1.56)	0.98	0.92	(0.58,1.45)	0.71
Teachers	51	18	33	1.34	(0.70,2.57)	0.38	1.1	(0.56,2.16)	0.78	1.2	(0.60,2.37)	0.61
Other/NA	114	32	82	0.96	(0.57,1.60)	0.87	0.91	(0.54,1.54)	0.74	0.85	(0.50,1.45)	0.55
Occupational activities
Sitting	347	109	238	0.86	(0.63,1.18)	0.35	1.01	(0.73,1.39)	0.97	1	(0.72,1.39)	0.99
Standing	574	199	375	1.43	(0.96,2.14)	0.08	1.2	(0.79,1.81)	0.4	1.22	(0.80,1.85)	0.36
Kneeling	115	48	67	1.56	(1.04,2.35)	0.03	1.44	(0.95,2.19)	0.09	1.43	(0.94,2.17)	0.1
Squatting	159	63	96	1.44	(1.00,2.08)	0.05	1.24	(0.85,1.81)	0.26	1.25	(0.86,1.82)	0.25
Driving	35	13	22	1.21	(0.60,2.44)	0.6	1.16	(0.56,2.38)	0.69	1.13	(0.54,2.37)	0.74
Walking	238	91	147	1.41	(1.02,1.95)	0.04	1.05	(0.74,1.49)	0.78	1.07	(0.75,1.52)	0.71
Upstairs	169	51	118	0.84	(0.58,1.22)	0.36	0.8	(0.54,1.17)	0.25	0.79	(0.54,1.17)	0.24
Climbing	94	38	56	1.44	(0.92,2.25)	0.11	0.9	(0.56,1.44)	0.65	0.92	(0.56,1.50)	0.73
Lifting	327	109	218	1.02	(0.75,1.39)	0.9	0.93	(0.67,1.28)	0.64	0.91	(0.65,1.26)	0.56

Model 1: Unadjusted OR; Model 2: Adjusted for age; Model 3: Adjusted for age, sex, BMI, smoking, usual walking speed.