Table 5.

Regression analysis on moving left or right^a

	Odds ratio	95% CI	P-value
ROC-recommended cut points
Not from France	2.45	1.20–5.02	0.014
Age <55 years	4.07	1.51–10.96	0.005
Presence of cough in last 4 weeks	2.11	1.29–3.43	0.003
Condition having little or no impact (1–2 on scale 1–7)b	1.82	1.05–3.16	0.032
On getting up and ready for the day
Increased Jenkins sleep scale score (≥7 on a scale 0–20)c	2.53	1.47–4.37	0.001
Kappa statistic-recommended cut points
Not from France	2.12	1.01–4.46	0.047
Age <55 years	3.78	1.62–8.80	0.002
Smoker	1.82	1.11–2.99	0.018
Presence of cough in last 4 weeks	2.38	1.41–4.02	0.001
Condition having little or no impact (1–2 on scale 1–7)b	2.18	1.24–3.84	0.007
On getting up and ready for the day
Increased Jenkins sleep scale score (≥7 on a scale 0–20)c	2.38	1.41–4.02	0.001

Notes:

^aThere were insufficient patients moving left to run this regression for GOLD-recommended cut points;

^bwhere 1= no impact and 7= constant impact on getting up and ready for the day;

^cwhere 0= no impact on sleep and 20= high impact on sleep.

Abbreviations: CI, confidence interval; GOLD, Global Initiative for Chronic Obstructive Lung Disease; ROC, receiver operating characteristic.