Table 6.

Logistic Regression Analysis of Demographic/Clinical Measures and the Technique Misuse

Variables	B	SE	OR (95% CI)	P
Age	0.03	0.02	1.03 (0.99–1.07)	0.189
Education level	−0.47	0.23	0.63 (0.40–0.99)	0.043
Sex	0.51	0.65	1.67 (0.47–5.95)	0.429
Weight	0.02	0.02	1.02 (0.98–1.06)	0.287
With respiratory diseases	0.75	0.88	2.11 (0.38–11.76)	0.395

Notes: Logistic regression analysis found that education level was a protective factor for technique misuse; the higher the level, the lower the incidence of technique misuse (OR = 0.63, 95% CI 0.40–0.99, P=0.043), indicated in bold.

Abbreviations: SE, standard errors; OR, odds ratios; CI, confidence interval.