Table 3

Univariate Association of Staff Predictor Variables Versus Unstable Medial Meniscal Tear at Arthroscopy

Clinical finding	Unstable tear, %		p value

	Yes, n = 66	No, n = 64
Demographics
Mean (and SD) age, yr	59 (9)	58 (9)	0.51^*

Male	57	43	0.08

Obesity (BMI >27)	54	50	0.73

History
Acute injury	34	38	0.61

Swelling	48	69	0.01

Giving way	42	42	0.94

Locking	22	22	0.96

Pain
Generalized	64	71	0.41

Focal	81	92	0.06

At rest	39	55	0.07

Rising from chair	81	89	0.21

Climbing stairs	89	92	0.54

Physical findings
Tenderness
Medial joint line	89	91	0.75

Lateral joint line	24	31	0.41

Pain with passive motion
Full flexion:	89	85	0.46

Anteromedial	58	68	0.26

Posteromedial	58	40	0.06

Anterolateral	24	24	1.00

Posterolateral	15	11	0.49

Full extension:	69	66	0.71

Anteromedial	58	68	0.26

Posteromedial	43	30	0.18

Anterolateral	21	34	0.14

Posterolateral	4	11	0.18

Special tests
McMurray	66	53	0.18

Steinman	50	43	0.43

Circumduction	74	61	0.59

Instability
Varus	17	18	0.85

Valgus	14	21	0.27

Lachman	6	6	1.00

Abnormal extension	38	54	0.08

Effusion
Visible	28	33	0.48

Ballotment	19	41	0.007

Sweep	37	52	0.08

Radiographic signs
1-m standing
Tibiofemoral varus (≤4°)	68	51	0.04

Medial joint space ≤2 mm	41	35	0.63

Lateral joint space ≤3 mm	2	9	0.72

45° Posteroanterior weight bearing

Tibiofemoral varus (≤4°)	69	52	0.03

Medial joint space ≤2 mm	47	40	0.41

Lateral joint space ≤3 mm	4	16	0.01