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. Author manuscript; available in PMC: 2021 Oct 1.
Published in final edited form as: Genet Epidemiol. 2020 Aug 16;44(7):748–758. doi: 10.1002/gepi.22331

Figure 2. ZZ-plots reveal strong correlations of chromosomal regions 15q25 and 19q13.2.

Figure 2.

Figure 2.

a. Comparing cigarettes smoked per day (y-axis) and smoking cessation (x-axis).

b. Comparing cigarettes smoked per day (y-axis) and lung cancer (x-axis).

c. Comparing cigarettes smoked per day (y-axis) and COPD (x-axis).

d. Comparing smoking cessation (y-axis) and lung cancer (x-axis).

e. Comparing smoking cessation (y-axis) and COPD (x-axis).

f. Comparing lung cancer (y-axis) and COPD (x-axis).

Each dot represents a SNP. The solid red line represents the genome-wide significance value (p-value = 5.00×10−8) converted to a z-score format. The chromosomal region 15q25.1 is color-coded gold. The chromosomal region 19q13.2 is color-coded purple. All other SNPs that were not in chromosomal regions 15.q25.1 and 19q13.2 were color-coded black.