Table 2

Frequency of medical consultation for knee symptoms according to occupational activities in the job held at the birthday before symptoms began

Occupational activity (in an average working day)	Men with any knee symptom			Men with locking
Occupational activity (in an average working day)	No. of men exposed to activity	% consulted general practitioner	% consulted orthopaedic surgeon	No. of men exposed to activity	% consulted general practitioner	% consulted orthopaedic surgeon
Sitting for >2 hours in total	316	53	22	44	61	34
Standing or walking for >2 hours in total	461	56	25	71	73	54
Kneeling for >1 hour in total	159	57	28	29	79	69
Squatting for >1 hour in total	147	58	31	30	80	73
Getting up from kneeling or squatting >30 times	210	54	28	36	75	64
Driving for >4 hours in total	113	56	25	22	55	41
Walking for >2 miles in total	266	56	27	43	72	60
Climbing >30 flights of stairs	152	58	28	17	88	59
Lifting or moving weights of 10+ kg by hand	318	56	25	49	71	57
Lifting or moving weights of 25+ kg by hand	241	54	26	37	68	54
All men	762	57	24	127	72	43