Table 2. Effect estimates of metabolic components in association with COPD.
| Metabolic components | Number | EE | 95% CI | P | I2 | PQ-test | Egger’s P |
|---|---|---|---|---|---|---|---|
| Categorical scale (EE = OR) | |||||||
| Hypertension | 11 | 1.55 | 1.14–2.11 | 0.005 | 64.4% | 0.002 | 0.539 |
| Diabetes | 12 | 1.1 | 0.93–1.32 | 0.273 | 13.5% | 0.312 | 0.01 |
| Obesity | 7 | 0.68 | 0.46–1.01 | 0.057 | 81.6% | <0.001 | 0.243 |
| High WC | 9 | 1.19 | 0.78–1.79 | 0.42 | 73.0% | <0.001 | 0.006 |
| High triglycerides | 10 | 1.28 | 0.9–1.81 | 0.169 | 66.2% | 0.002 | 0.063 |
| Low HDLC | 10 | 1.09 | 0.82–1.45 | 0.536 | 26.8% | 0.197 | 0.568 |
| Continuous scale (EE = WMD) | |||||||
| BMI | 17 | –1.463 | –2.716 to –0.211 | 0.022 | 98.2% | <0.001 | 0.728 |
| WC | 16 | 0.247 | –0.666 to 1.16 | 0.596 | 72.3% | <0.001 | 0.101 |
| SBP | 15 | 3.626 | 1.537 to 5.714 | 0.001 | 81.7% | <0.001 | 0.786 |
| DBP | 15 | –0.708 | –1.842 to 0.426 | 0.221 | 80.9% | <0.001 | 0.574 |
| Glucose | 15 | 2.976 | 0.141 to 5.812 | 0.04 | 81.8% | <0.001 | 0.025 |
| Triglycerides | 17 | –4.827 | –10.685 to 1.031 | 0.106 | 68.0% | <0.001 | 0.706 |
| TC | 5 | –2.385 | –10.346 to 5.701 | 0.563 | 86.4% | <0.001 | 0.809 |
| HDLC | 17 | 0.234 | –0.825 to 1.293 | 0.665 | 63.2% | <0.001 | 0.248 |
| LDLC | 7 | –3.609 | –12.038 to 4.82 | 0.401 | 87.6% | <0.001 | 0.912 |
Abbreviations: 95% CI, 95% confidence interval; BMI, body mass index; COPD, chronic obstructive pulmonary disease; DBP, diastolic blood pressure; EE, effect estimate; HDLC, high-density lipoprotein cholesterol; LDLC, low-density lipoprotein cholesterol; OR, odds ratio; SBP, systolic blood pressure; TC, total cholesterol; TG, triglycerides; WC, waist circumstance; WMD, weighted mean difference. The term ‘Number’ in the first row referred to the number of eligible studies.