TY - JOUR
T1 - The Impact of Subclinical Hypothyroidism on the Quality of Life During Pregnancy
T2 - Mapping 5-Level Version of EQ-5D and ThyPRO-39
AU - Jan, Tuzil
AU - Barbora, Pilnackova Filkova
AU - Torquil, Watt
AU - Jan, Jiskra
AU - Marcela, Koudelkova
AU - Eva, Novotna
AU - Klara, Tuzilova
AU - Tomas, Dolezal
AU - Jana, Bartakova
N1 - Publisher Copyright:
© 2023 International Society for Pharmacoeconomics and Outcomes Research, Inc.
PY - 2023/7
Y1 - 2023/7
N2 - OBJECTIVES: To describe how subclinical hypothyroidism (SubHypo) influences the quality of life (QoL) during pregnancy.METHODS: In primary data collection (NCT04167423), thyroid stimulating hormone (TSH), free thyroxine (FT4), thyroid peroxidase antibodies, generic quality of life (QoL; 5-level version of EQ-5D [EQ-5D-5L]), and disease-specific QoL (ThyPRO-39) were measured among pregnant women. SubHypo during each trimester was defined according to the 2014 European Thyroid Association guidelines (TSH > 2.5, 3.0, and 3.5 IU/L, respectively; with normal FT4). Path analysis described relationships and tested mediation. Linear ordinary least squares, beta, tobit, and two-part regressions were used to map ThyPRO-39 and EQ-5D-5L. Alternative SubHypo definition was tested in sensitivity analysis.RESULTS: A total of 253 women at 14 sites (31 ± 5 years old, 15 ± 6 weeks pregnant) completed the questionnaires. Sixty-one (26%) had SubHypo and differed from 174 (74%) euthyroid women in smoking history (61% vs 41%), primiparity (62% vs 43%) and TSH level (4.1 ± 1.4 vs 1.5 ± 0.7 mIU/L, P < .001). EQ-5D-5L utility in SubHypo (0.89 ± 0.12) was lower than that in euthyroid (0.92 ± 0.11; P = .028) even after adjustment (difference -0.04, P = .033), whereas ocular (P = .001, ThyPRO-39), cognitive symptoms (P = .043), anxiety (P < .0001), and the composite score were higher. The impact of SubHypo on utility was mediated by anxiety. Results were confirmed by sensitivity analysis. Final mapping equation (ordinary least squares) includes goiter symptoms, anxiety, upset stomach, composite score (ThyPRO-39), FT4 levels, and week of pregnancy (determination coefficient 0.36).CONCLUSION: This is the first QoL mapping of SubHypo during pregnancy and the first evidence that SubHypo is associated with a negative impact on QoL. The effect is mediated by anxiety. EQ-5D-5L utilities can be generated based on ThyPRO-39 scores collected in pregnant euthyroid and patients with SubHypo.
AB - OBJECTIVES: To describe how subclinical hypothyroidism (SubHypo) influences the quality of life (QoL) during pregnancy.METHODS: In primary data collection (NCT04167423), thyroid stimulating hormone (TSH), free thyroxine (FT4), thyroid peroxidase antibodies, generic quality of life (QoL; 5-level version of EQ-5D [EQ-5D-5L]), and disease-specific QoL (ThyPRO-39) were measured among pregnant women. SubHypo during each trimester was defined according to the 2014 European Thyroid Association guidelines (TSH > 2.5, 3.0, and 3.5 IU/L, respectively; with normal FT4). Path analysis described relationships and tested mediation. Linear ordinary least squares, beta, tobit, and two-part regressions were used to map ThyPRO-39 and EQ-5D-5L. Alternative SubHypo definition was tested in sensitivity analysis.RESULTS: A total of 253 women at 14 sites (31 ± 5 years old, 15 ± 6 weeks pregnant) completed the questionnaires. Sixty-one (26%) had SubHypo and differed from 174 (74%) euthyroid women in smoking history (61% vs 41%), primiparity (62% vs 43%) and TSH level (4.1 ± 1.4 vs 1.5 ± 0.7 mIU/L, P < .001). EQ-5D-5L utility in SubHypo (0.89 ± 0.12) was lower than that in euthyroid (0.92 ± 0.11; P = .028) even after adjustment (difference -0.04, P = .033), whereas ocular (P = .001, ThyPRO-39), cognitive symptoms (P = .043), anxiety (P < .0001), and the composite score were higher. The impact of SubHypo on utility was mediated by anxiety. Results were confirmed by sensitivity analysis. Final mapping equation (ordinary least squares) includes goiter symptoms, anxiety, upset stomach, composite score (ThyPRO-39), FT4 levels, and week of pregnancy (determination coefficient 0.36).CONCLUSION: This is the first QoL mapping of SubHypo during pregnancy and the first evidence that SubHypo is associated with a negative impact on QoL. The effect is mediated by anxiety. EQ-5D-5L utilities can be generated based on ThyPRO-39 scores collected in pregnant euthyroid and patients with SubHypo.
KW - Adult
KW - Anxiety
KW - Female
KW - Humans
KW - Hypothyroidism
KW - Pregnancy
KW - Quality of Life/psychology
KW - Surveys and Questionnaires
KW - Thyrotropin
UR - http://www.scopus.com/inward/record.url?scp=85151741834&partnerID=8YFLogxK
U2 - 10.1016/j.jval.2023.02.015
DO - 10.1016/j.jval.2023.02.015
M3 - Journal article
C2 - 36878311
AN - SCOPUS:85151741834
SN - 1098-3015
VL - 26
SP - 1085
EP - 1097
JO - Value in Health
JF - Value in Health
IS - 7
ER -