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Table 2 Data and results for the scores derived by principal component analysis (PCA)

From: Factors that shape pregnant women’s perceptions regarding the safety of cannabis use during pregnancy

  Factor loadings Every day Most days A few times Never
Overwhelmed/exhausted (21.4% of variance)
 Had difficulty sleeping 0.799 16.0% 27.3% 43.6% 13.1%
 Felt exhausted 0.762 21.0% 34.9% 41.5% 2.6%
 I was in pain 0.639 6.2% 7.7% 42.3% 43.8%
 Felt overwhelmed 0.631 9.0% 22.7% 50.5% 17.7%
Happy/optimistic (18.8% of variance)
 Felt optimistic and hopeful 0.843 28.0% 50.9% 17.8% 3.3%
 Felt safe and relaxed 0.748 53.8% 36.7% 8.7% 0.7%
 Felt happy and excited 0.692 32.1% 51.3% 14.8% 1.8%
Health concerns (15.3% of variance)
 Worried about being able to eat healthy 0.694 8.3% 11.6% 31.2% 48.9%
 Worried about gaining too much weight 0.686 11.8% 12.3% 35.7% 40.4%
 Nausea and/or vomiting 0.666 5.1% 10.1% 42.8% 42.0%
  1. The PCA used the answers to: “During the week before this day how often did you experience the following?” Three axes with eigenvalues above 1.0 were determined that explained 55.5% of the variance. The Kaiser-Meyer-Olkin Measure of Sampling Adequacy was 0.691, indicating moderate adequacy; Bartlett’s test of Sphericity was 469.6. df = 45, P < 0.001. Percentages given exclude women who did not answer the question