Table 2. Accuracy of the MS-Q instrument when used for screening of migraine without aura (95% confidence intervals are shown in parenthesis).

Sample	Sensitivity	Specificity	Positive Predictive Value	Negative Predictive Value	Positive Likelihood Ratio	Negative Likelihood Ratio	Accuracy
Whole sample (n = 429)	80% (74.7%–84.6%)	87.2% (81.1%–91.9%)	91.0% (87.1%–93.8%)	72.9 % (67.8%–77.6%)	6.3 (4.2–9.4)	0.2 (0.2–0.3)	82.8% (78.8%–86.2%)
Women (n = 312)	82.6% (76.5%–87.6%)	83.8% (75.8%–89.9%)	89.4% (84.8%–92.8%)	74.2% (67.8%–79.8%)	5.1 (3.4–7.7)	0.2 (0.2–0.3)	83.0% (78.4%–87.0%)
Men (n = 117)	72.9% (60.9%–82.8%)	95.7% (85.5%–99.5%)	96.2% (86.7%–99.0%)	70.3% (61.6%–77.7%)	17.1 (4.4–66.9)	0.3 (0.2–0.4)	82.1% (73.9%–88.5%)