Table 3

Sensitivity, specificity, and predictive values of the proposed criteria by Lems and Dijkmans⁸ for the bone density cut off categories T score ≤−1.0, T score ≤−2.5 (World Health Organisation osteoporosis definition⁶), and Z score ≤−1.0 tested on all 287 patients with RA and on subgroups of patients according to sex (235 women and 52 men) and menopausal status (72 premenopausal and 163 postmenopausal)

	T score ≤−1	T score ≤−2.5	Z score ≤−1
PPV=Positive predictive value; NPV=negative predictive value.
Sensitivity (%):
All	59	73	58
Women	59	74	61
Premenopausal	26	75	35
Postmenopausal	68	74	71
Men	57	67	50
Specificity (%):
All	66	56	54
Women	67	57	56
Premenopausal	83	82	86
Postmenopausal	51	42	42
Men	60	50	43
PPV (%):
All	78	31	41
Women	76	32	41
Premenopausal	53	20	53
Postmenopausal	79	33	39
Men	86	29	39
NPV (%):
All	44	88	70
Women	47	89	74
Premenopausal	60	98	74
Postmenopausal	36	80	74
Men	25	83	54