Table 3.

Self-reported knee complaints among floor layers (n = 134) compared to graphic designers (n = 120)

	Floor layers		Graphic designers
Questionnaire response	n	%	n	%	OR adj.†	95% CI
Knee pain‡	89	67.4	50	42.0	2.7	1.5–4.6
Knee pain at night‡	49	37.1	21	17.6	3.5	1.8–6.6
Knee pain during stair walking‡	86	65.2	52	43.7	2.2	1.3–3.9
Morning stiffness	78	58.2	48	40.0	1.9	1.1–3.2
Catch or hang up of the knee	42	31.3	16	13.3	2.9	1.4–5.7
Swelling of the knee	65	48.5	25	20.8	4.7	2.5–8.6
Difficult during squatting§	82	61.2	62	53.4	1.6	0.9–2.7
Difficult during kneeling§	91	67.9	63	54.3	1.8	1.0–3.1

Adjusted odds ratio (OR) with 95% confidence intervals (CI).

^† Adjusted for body mass index, age and knee straining sports

^‡ One graphic designer and two floor layers had not answered questions about knee pain

^§ Four graphic designers had not answered questions about difficult during squatting and kneeling