Incidence of fracture hospitalization and surgery during pregnancy in Finland-1998-2017: a retrospective register-based cohort study.

INTRODUCTION: The aim of this study was to assess the incidence of all major fractures and surgery during pregnancy and the outcomes of pregnancy in Finland between 1998 and 2017. MATERIALS AND METHODS: A retrospective cohort study using nationwide data from the Finnish Care Register for Health Care and the Finnish Medical Birth Register. As participants we included all women aged between 15 and 49 years from January 1, 1998 to December 31, 2017 and their ≥ 22-week pregnancies. RESULTS: Of a total 629,911 pregnancies, 1813 pregnant women were hospitalized with a fracture diagnosis, yielding an incidence of 247 fractures/100,000 pregnancy-years. Of these, 24% (n = 513/2098) were treated operatively. The most common fractures were fractures of the tibia, ankle, and the forearm, which made up half of all fractures. The incidence of pelvic fractures was 6.8/100,000 pregnancy-years, with an operation rate of 14%. The stillbirth rate of all fracture patients was low at 0.6% (n = 10/1813), although this was 1.5-fold the overall stillbirth rate in Finland. Lumbosacral and comminuted spinopelvic fractures resulted in preterm delivery in 25% (n = 5/20) of parturients, with a stillbirth rate of 10% (n = 2/20). CONCLUSION: The incidence of fracture hospitalization during pregnancy is lower than in the general population, and fractures in this population are more often treated conservatively. A higher proportion of preterm deliveries and stillbirths occurred in women with lumbosacral and comminuted spinopelvic fractures. Maternal mortality and stillbirth rates remain low among women with fractures leading to hospitalization or surgery during pregnancy.

Incidence of Peripheral Nerve Decompression Surgery During Pregnancy and the First Year After Delivery in Finland From 1999 to 2017: A Retrospective Register-Based Cohort Study.

PURPOSE: We aimed to report the incidence of peripheral nerve decompression surgery during pregnancy and 12 months after delivery in Finland from 1999 to 2017. METHODS: Using nationwide data from the Finnish Care Register for Health Care and the Finnish Medical Birth Register, all women of potentially childbearing age (15-49 years) who underwent peripheral nerve decompression surgery or had a pregnancy ending in delivery from January 1, 1999, to December 31, 2017, were included. Incidence rates and incidence rate ratios for operations were calculated for both childbearing women and the age-adjusted general female population. RESULTS: In total, 308 women underwent carpal tunnel release (CTR) during pregnancy, and an additional 675 women underwent CTR within 12 months after delivery. The incidence of CTR during pregnancy was 38 per 100,000 person-years, with an incidence rate ratio of 0.5 (95% CI, 0.4-0.6), when compared with that in the general population. Women who were active smokers before becoming pregnant were more likely to undergo CTR during pregnancy (odds ratio, 2.4; 95% CI, 1.8-3.0). The highest rates of CTR were observed during the first trimester. The incidence of CTR in the first postpartum year increased steadily during the first 4 months to 79 per 100,000 person-years. During the latter 8 months, incidences were similar to those in the general population (incidence rate ratio, 1.0; 95% CI, 0.9-1.2). Women who smoked were more likely to undergo CTR during the first postpartum year (odds ratio, 1.6; 95% CI, 1.3-1.9). CONCLUSIONS: Carpal tunnel release is performed more rarely during pregnancy than in the age-matched general population. Postpartum incidences increased toward the end of the first year, reaching those observed in the general population after the first 4 months. Smoking before pregnancy is associated with increased incidences of CTR both during pregnancy and the first year after delivery. TYPE OF STUDY/LEVEL OF EVIDENCE: Prognostic II.

Incidence of lumbar discectomy during pregnancy and within 12 months post-partum in Finland between 1999 and 2017: a retrospective register-based cohort study.

BACKGROUND CONTEXT: Both lumbar disc herniation in the general population and lower back pain in the pregnant population are known to be common conditions. The physiological and anatomical of the mother predispose to increased strain of the lumbar disc, whereas pregnancy may promote caution in physicians contemplating surgical care. PURPOSE: We aimed to report the incidence of lumbar discectomy during pregnancy and 12 months postpartum in Finland between 1999 and 2017. STUDY DESIGN: Retrospective register-based cohort study. PATIENT SAMPLE: Using nationwide data from the Finnish Care Register for Health Care and the Finnish Medical Birth Register, all women aged 15 to 49 years with a lumbar discectomy or pregnancy ending in delivery from 1st January, 1999 to 31st December, 2017 were included. OUTCOME MEASURES: Incidence rates and their 95% confidence intervals were calculated for lumbar discectomy. Incidence rate ratios (IRR) were calculated between the study population and the control population. The effect of smoking on surgery risk was reported using odds ratios. METHODS: A retrospective statistical analysis was performed to identify patients undergoing lumbar discectomy during pregnancy or the first 12 months after delivery. Incidence rates were compared with the age-adjusted values of the age-matched female general population. The effect of smoking on the risk of lumbar discectomy was analyzed using age-adjusted odds ratios. RESULTS: In total, 91 discectomies were performed during pregnancy and 508 within 12 months postpartum. The total incidence of lumbar discectomy during pregnancy was 11 operations per 100,000 person-years with an IRR of 0.2 (95% CI 0.1-0.2) when compared with the age-adjusted female general population. Women with active smoking before pregnancy were at a higher risk for lumbar discectomy during pregnancy (OR 2.0, 95% CI 1.2-3.2). Caesarean section was more common after lumbar discectomy (22%). No perinatal mortality was observed. During the first-year postpartum the rate of lumbar discectomy increased to 47 per 100 000 person-years with an IRR of 0.7 (95% CI 0.6-0.8). 90-day reoperation rates were higher than in the general population with an IRR of 1.7 (95% CI 1.1- 2.7). CONCLUSIONS: Lumbar discectomy during pregnancy is rare, but smoking increases the risk. Lumbar discectomy during pregnancy seems to be safe for the neonate. Postpartum incidences increased towards the end of the first year, but remained below the rates in the general population with a higher risk for short-term reoperation.

Smoking is associated with an increased risk for fractures in women after childbirth: a nationwide population-based cohort study in Finland.

BACKGROUND AND PURPOSE: Smoking weakens bone health and increases the risk of fractures. We investigated the incidence of fractures in smoking, fertile-aged women and compared it with that of non-smoking, fertile-aged women using data from nationwide registers. PATIENTS AND METHODS: We conducted a retrospective register-based nationwide cohort study from 1998 to 2018. We identified all women smoking during pregnancy from the Medical Birth Register and compared these with non-smokers. We gathered fractures for both groups from the Care Register for Health Care. Pregnancies with missing smoking or socioeconomic status were excluded. A Cox regression model was used to analyze adjusted hazard ratios (aHR) with 95% confidence intervals (CI) for fractures during the 5-year follow-up starting from delivery. The model was adjusted for the age of the mother at the time of delivery and socioeconomic status. RESULTS: The smoking group included 110,675 pregnancies and the non-smoking group 628,085 pregnancies. The overall fracture rate was higher in smokers after 1-year follow-up (aHR 1.7, CI 1.5-2.0) and 5-year follow-up (aHR 1.7, CI 1.6-1.8). After 5-year follow-up, the fracture rates for polytraumas (aHR 2.3, CI 1.4-3.7), inpatient admitted fractures (aHR 2.0, CI 1.7-2.4), and non-admitted fractures (aHR 1.8, CI 1.7-1.9) were all higher among smoking women. CONCLUSION: Smoking in fertile-aged women was associated with a higher risk of fractures during the 1-year and 5-year follow-up after giving birth, also after adjusting for age and socioeconomic status. Whether the increased fracture risk is caused by direct effects of smoking on bone health or riskier behavior remains uncertain.

Pregnancy and delivery after spine fracture or surgery: A nationwide population-based register study in Finland.

BACKGROUND: The incidences of spine fractures and fusion surgeries have increased. A few studies have reported an increased rate of caesarean sections (CS) in women who have undergone spine surgery but have not reported on the health of neonates. OBJECTIVE: We report the incidence of spine fractures, spine fracture surgeries and fusion surgery for other reasons and the effect of these injuries and procedures on later pregnancy outcomes in Finland. METHODS: Data on all fertile-aged women (1998-2018) who had undergone spine fracture or spine fusion surgery were retrieved from the Care Register for Healthcare and combined with data from the National Medical Birth Register. Women with spine fracture or spine surgery before pregnancy were compared with women without previous spine fracture or surgery. We calculated incidences of spine fracture, spine fracture surgery and fusion surgery for other reasons with 95% confidence intervals (CI). We used multivariable logistic regression to evaluate CS and neonatal health. Results are reported as adjusted odds ratios (AOR). RESULTS: The main finding of our study was the increasing incidence (156%) of spine fusion surgeries for other reasons in fertile-aged women. A total CS rate (including elective and unplanned CS) in the spine fracture group was 19.7% (AOR 1.26, CI 1.17-1.34), in fusion surgery for other reasons group 25.3% (AOR 1.37, CI 1.30-1.49) and 15.9% in the control group. The rate for neonates requiring intensive care in the spine fracture group was 12.2% (AOR 1.18, CI 1.08-1.29), in fusion surgery for other reasons group 13.6% (AOR 1.12, CI 1.02-1.23) and 10.0% in the control group. CONCLUSIONS: The incidence of fusion surgery for other reasons increased during our study period. The rate of CS was higher in women with preceding spine fracture or fusion surgery. Our results suggest that vaginal delivery after fractures of the spine is both possible and safe for mother and neonate.

Incidence of vaginal birth-related rupture of the pubic symphysis: A nationwide register study in Finland from 1998 to 2018.

BACKGROUND AND PURPOSE: To assess the incidence of vaginal birth -related rupture of the pubic symphysis in Finland from 1998 to 2018. METHODS: A retrospective cohort study using nationwide data from the Finnish Care Register for Health Care and the Finnish Medical Birth Register. As participants we included all ≥ 22-week pregnancies of women aged between 15 and 49 years from January 1, 1998 to December 31, 2017. Pubic symphysis rupture was classified based on the ICD-10 code S33.4 and operations were gathered with pelvis-specific operation codes of the Nordic NOMESCO-classification. Incidence per 100 000 deliveries with 95% confidence intervals (CI) was calculated for symphysis rupture and surgery using Poisson's exact test. RESULTS: For a total 1 175 326 deliveries, a total of 9 pubic symphysis ruptures occurred during the intrapartum and puerperal periods. All ruptures occurred after vaginal delivery. Of these, 4 ruptures were treated operatively. The incidence of rupture for vaginal delivery was 0.9 per 100 000 deliveries (CI 0.1 to 1.0). No perinatal mortality was observed. CONCLUSIONS: Birth -related ruptures of the pubic symphysis are rate events and are mostly associated with vaginal delivery with most ruptures being treated conservatively.

Incidence of Fracture Hospitalization and Surgery in Women Increases Steadily During the Puerperal and Lactation Period: A Retrospective Register-Based Cohort Study in Finland From 1999 to 2018.

This retrospective cohort study assesses the incidences of major fractures and surgery in women during the puerperium and the lactation period in Finland between January 1, 1999, and December 31, 2018. Using nationwide data from the Finnish Care Register for Health Care and the Finnish Medical Birth Register, all women aged between 15 and 49 years with a fracture hospitalization within 12 months of delivery between 1999 and 2018 were included. During the study period, a total of 3140 fractures after delivery and 152,800 fractures of the female normal population of similar age were hospitalized. The incidence rate after delivery increased from 219/100,000 person-years during the first 4 months to 310 fractures/100,000 person-years during the latter 8 months of the first year after delivery. Altogether, 29% (n = 904/3140) of these fractures were treated operatively. The most common fractures were ankle and distal radius fractures, which made up one-third of all fractures. The incidence of pelvic fracture hospitalization was 15/100,000 person-years at 4 months after delivery, with an operation rate of 22%. Over half of all fractures occurred between 6 and 12 months after delivery (mean 6.6 months). The incidence of fracture hospitalization after delivery increased steadily during the puerperium and the lactation periods but remained lower than in the general population (age-adjusted incidence 554/100,000 person-years) with an incidence rate ratio of 0.51. However, a higher proportion of pelvic fractures were observed in the first months after delivery. Surgical rates were in line with the general population. Fractures of the wrist and ankle made up most of the fractures. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).

Birth rate after major trauma in fertile-aged women: a nationwide population-based cohort study in Finland.

BACKGROUND: To date, only a few small studies have assessed the effects of major orthopedic traumas on the subsequent birth rate in fertile-aged woman. We assessed the incidences of traumatic brain injury (TBI) and fractures of the spine, pelvis, and hip or thigh and evaluated their association with the birth rate in fertile-aged woman. METHODS: In this retrospective register-based nationwide cohort study, data on all fertile-aged (15-44 years of age) women who sustained a TBI or fracture of the spine, pelvis, hip or thigh between 1998 and 2013 were retrieved from the Care Register for Health Care. A total of 22,780 women were included in TBI group, 3627 in spine fracture group, 1820 in pelvic fracture group, and 1769 in hip or thigh fracture group. The data were subsequently combined with data from the National Medical Birth Register. We used Cox regression model to analyze the hazard for a woman to give birth during 5-year follow-up starting from a major trauma. Women with wrist fractures (4957 women) formed a reference group. Results are reported as hazard ratios (HR) with 95% confidence intervals (CI). RESULTS: During 5-year follow-up after major trauma, 4324 (19.0%) women in the TBI group, 652 (18.0%) in the spine fracture group, 301 (16.5%) in the pelvic fracture group, 220 (12.4%) in the hip or thigh fracture group, and 925 (18.7%) in the wrist fracture group gave birth. The cumulative birth rate was lower in the hip or thigh fracture group in women aged 15-24 years (HR 0.72, CI 0.58-0.88) and 15-34 years (HR 0.65, CI 0.52-0.82). Women with pelvic fracture aged 25-34 years also had a lower cumulative birth rate (HR 0.79, CI 0.64-0.97). For spine fractures and TBIs, no reduction in cumulative birth rate was observed. Vaginal delivery was the primary mode of delivery in each trauma group. However, women with pelvic fractures had higher rate of cesarean section (23.9%), when compared to other trauma groups. CONCLUSIONS: Our results suggest that women with thigh, hip, or pelvic fractures had a lower birth rate in 5-year follow-up. Information gained from this study will be important in clinical decision making when women with previous major trauma are considering becoming pregnant and giving birth.

To date, only a few small studies have assessed the effects of major orthopedic traumas on the subsequent birth rate in fertile-aged woman. We assessed the incidences of traumatic brain injury (TBI) and fractures of the spine, pelvis, and hip or thigh and evaluated their association with the birth rate in fertile-aged woman.Data on all fertile-aged (15­44 years of age) women who sustained a TBI or fracture of the spine, pelvis, hip or thigh between 1998 and 2013 were retrieved from the Care Register for Health Care and the data was then subsequently combined with data from the National Medical Birth Register.A total of 22,780 women were included in TBI group, 3627 in spine fracture group, 1820 in pelvic fracture group, 1769 in hip or thigh fracture group, and 4957 in wrist fracture group, which was used as control group. Of these, 4324 (19.0%) women in the TBI group, 652 (18.0%) in the spine fracture group, 301 (16.5%) in the pelvic fracture group, 220 (12.4%) in the hip or thigh fracture group, and 925 (18.7%) in the wrist fracture group gave birth during the 5-year follow-up.Our results suggest that women with thigh, hip, or pelvic fractures had a lower birth rate in 5-year follow-up. Information gained from this study will be important in clinical decision making when women with previous major trauma are considering becoming pregnant and giving birth.

Pregnancy and delivery after traumatic brain injury: a nationwide population-based cohort study in Finland.

OBJECTIVES: Few studies have assessed pregnancies and deliveries after traumatic brain injury (TBI). We report the incidence of TBIs and TBI-related surgeries in fertile-aged females and investigate subsequent pregnancy outcomes. METHODS: All fertile-aged (15-49) women with TBI diagnosis during our study period (1998-2018) were retrieved from the Care Register for Health Care and combined with data from the National Medical Birth Register. TBIs were categorized into three subgroups based on the length of the hospitalization period and the need for neurosurgery. Logistic regression was used to analyze preterm deliveries, cesarean sections (CS) and neonatal health. Results are reported as adjusted odds ratios (AOR) with 95% confidence intervals (CI). RESULTS: The incidence of TBIs increased from 103 per 100 000 person-years in 1998 to 257 per 100 000 (149.5%) in 2018. The incidence of TBI-related surgeries remained stable during our study period. The rate of preterm deliveries was 5.6% in the TBI group and 3.0% in the control group (AOR 1.23, CI 1.17-1.28). The CS rate in the TBI group was 19.2% and 15.9% in the control group (AOR 1.23, CI 1.18-1.29). The use of labor analgesia was higher among women with previous TBI. The rate of neonates requiring intensive care in the TBI group was 13.1% and 9.9% in the control group (AOR 1.30, CI 1.24-1.37). CONCLUSION: The incidence of TBI hospitalizations increased during our study period, whereas the number of surgically treated TBI remained stable. Preterm deliveries, CS, instrumental vaginal deliveries and labor analgesia were more prevalent in women with previous TBI. Furthermore, more neonates required intensive care in this group. Therefore, a history of TBI should be acknowledged as a possible factor affecting the delivery and health of the neonate.

Pregnancy and delivery after pelvic fracture in fertile-aged women: A nationwide population-based cohort study in Finland.

OBJECTIVE: Only a few small studies have assessed the effects of pelvic fractures on pregnancies, deliveries, and rates of cesarean sections. We aimed to evaluate the effect of pelvic fractures on subsequent pregnancy and delivery in Finland. STUDY DESIGN: In this retrospective register-based nationwide cohort study, data on all fertile-aged (aged 15-49) women with a pelvic fracture during our study period (1998-2018) were retrieved from the Care Register for Health Care. The data were subsequently combined with data from the National Medical Birth Register. Women with pelvic fracture before pregnancy were compared with a no-fracture group consisting of 621 141 women who had had 1 156 723 singleton deliveries without a preceding pelvic fracture. We used logistic regression to analyze preterm deliveries, cesarean sections, and neonatal health. Results are reported as adjusted odds ratios (AOR) with 95% confidence intervals (CI). RESULTS: A total of 2 878 women with a previous pelvic fracture were identified. Of these, 596 women had 1024 singleton deliveries after pelvic fracture. In the no-fracture group, 621 141 women had 1 156 378 singleton deliveries. Compared to the no-fracture group, women with a previous pelvic fracture had higher rates of cesarean sections (22.6% vs 15.9%) (AOR 1.55 CI 1.32-1.80), higher rate of preterm deliveries (6.2% vs 4.6%) (1.32 CI 1.01-1.69), and a higher rate of neonates requiring intensive care unit treatment (13.5% vs 10.0%) (AOR 1.35 CI 1.13-1.62). CONCLUSION: Vaginal delivery was the primary mode of delivery despite the higher rate of cesarean section among women with a previous fracture of the pelvis. The rate for preterm deliveries and need for neonatal intensive care was also higher, but the clinical importance of these findings is unclear. Our results suggest that vaginal delivery after fractures of the pelvic circle is generally safe for both mother and neonate.