Validation of self-administered tests for screening for chronic pregnancy-related pelvic girdle pain

Table 2 Results of positive self-administered pain provocation tests

Self-administered test	Number of positive tests
Self-administered test	Total n = 289	PGP n = 51	No PGP n = 238	p-value between groups	Sensi-tivity	Speci-ficity	NPV	PPV
Tests for anterior pgp
Trendelenburg, symphyseal pain	16 (5.5%)	9 (17.6%)	7 (2.9%)	0.001	17.6	2.9	84.6	56.3
MAT	24 (8.3%)	12 (23.5%)	12 (5.0%)	< 0.001	23.5	5.0	85.3	50.0
Tests for posterior pgp
Trendelenburg, posterior pain	46 (15.9%)	25 (49.0%)	21 (8.8%)	< 0.001	49.0	8.8	84.8	54.3
P4	68 (23.5%)	29 (56.9%)	39 (16.3%)	< 0.001	56.9	16.4	90.0	42.6
Bridging	60 (20.8%)	29 (56.9%)	31 (13.0%)	< 0.001	56.9	13.0	90.4	48.3
Patrick Faber	80 (27.7%)	31 (60.8%)	49 (20.6%)	< 0.001	60.8	20.5	90.9	51.7
Total number of positive PGP tests, 0–12	0 (0–12)	4 (0–12)	0 (0–12)	< 0.001
Additional tests
ASLR, pain	66 (22.8%)	30 (58.8%)	36 (15.1%)	< 0.001	58.8	15.1	82.9	100
ASLR, difficulty	0 (0–8)	2 (0–8)	0 (0–6)	< 0.001
Modified SLR	21 (7.3%)	11 (21.6%)	10 (4.2%)	< 0.001	21.6	4.2	85.1	52.4

Sensitivity: proportion of positives that are correctly identified by the test.
Specificity: proportion of negatives that are correctly identified by the test.
NPV (Negative Predictive Value): proportion of patients with a positive test who are correctly diagnosed.
PPV (Positive Predictive Value): proportion of patients with a negative test who are correctly diagnosed.
P4 Posterior Pelvic Pain Provocation test, ASLR Active Straight Leg Raising test, SLR Straight Leg Raise test, PGP Pelvic Girdle Pain.

ISSN: 1471-2474