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Table 4 Relative risk (RR) of cancer in offspring according to maternal hyperemesis gravidarum (HG)- status for selected types of cancer combined and separately for the most common types according to age at diagnosis, with 95 % confidence intervals (95 % CI)

From: Hyperemesis gravidarum and risk of cancer in offspring, a Scandinavian registry-based nested case–control study

Cancer type

Age at diagnosis, in years

Crude RR (95 % CI)

Adjusted RR* (95 % CI)*

All selected cancer forms

n = 9.352

0–10

1.16 (0.90–1.51)

1.18 (0.91–1.53)

n = 5.453

11–20

1.21 (0.84–1.74)

1.21 (0.84–1.74)

Leukemia

n = 4.114

0–10

1.07 (0.70–1.64)

1.08 (0.71–1.65)

n = 1.000

11–20

0.70 (0.25–1.93)

0.70 (0.25–1.93)

Central nervous system

n = 3.003

0–10

1.18 (0.74–1.89)

1.22 (0.76–1.94)

n = 1.521

11–20

1.27 (0.63–2.56)

1.27 (0.62–2.56)

Lymphoma

n = 491

0–10

0.95 (0.29–3.12)

0.94 (0.28–3.10)

n = 1.362

11–20

2.13 (1.14–3.99)

2.08 (1.11–3.90)

Nephroblastoma

n = 422

0–10

2.02 (0.94–4.35)

2.06 (0.95–4.45)

n = 19

11–20

  1. *Adjusted for maternal age and maternal country of birth