Clalit Cohort Study
Study profileDescription
This cohort is managed by Clalit, the largest health maintenance organization in Israel, aiming at monitoring the health impact of COVID-19 variants of concern in pregnant women and children in Israel. All health–related transactions are documented in fully integrated electronic health records which include data for COVID-19 diagnosis, clinical management (inpatient and outpatient visits, referrals etc), vaccinations and linked records on COVID-19 diagnoses among family and household members.
Countries involved: Israel
Related publications:
- Cohen-Stavi CJ, Magen O, Barda N, Yaron S, Peretz A, Netzer D, Giaquinto C, Judd A, Leibovici L, Hernán MA, Lipsitch M, Reis BY, Balicer RD, Dagan N. BNT162b2 Vaccine Effectiveness against Omicron in Children 5 to 11 Years of Age. N Engl J Med. 2022;387(3):227-236. doi:10.1056/NEJMoa2205011.
Metadata collected
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| Data collected? | |
| Demographics | |
| Date of birth (full or MM/YY) | ✅ |
| Age at contact | |
| Sex / gender | ✅ |
| Country of birth | ✅ |
| Ethnic group / race / population sector | ✅ |
| Income level | |
| Employment / occupation | |
| Other socio-economic status proxy | |
| Education level | |
| Civil status (‘marital’) | |
| Locality (of health care provision) | |
| Locality (of residence) | ✅ |
| Household size | |
| Household composition | |
| Hospitalisation | |
| Admission / discharge dates or duration | ✅ |
| Episode dates | |
| Episode type (e.g., general; birth) | ✅ |
| Diagnosis (e.g., codes) | ✅ |
| Procedures (e.g., codes) | |
| Procedures dates | |
| Dispensed medications | |
| ICU admission | |
| Admission type (planned/emergency) | |
| Hospitalisation for COVID-19 | ✅ |
| Primary care, outpatient care | |
| Date of visit / contact | ✅ |
| Diagnosis codes | ✅ |
| Dispensed medications codes | ✅ |
| Dispensed medications date | ✅ |
| Primary care utilisation summary | |
| Health status and exposures | |
| Height | ✅ |
| Weight | ✅ |
| Date of anthropometrics | ✅ |
| Chronic / co-morbid conditions~ | ✅ |
| Medications for chronic conditions | ✅ |
| Smoker in household | |
| Current smoker | ✅ |
| ~ can include obesity | |
| Vaccines | |
| COVID-19 vaccine (timing, doses) | ✅ |
| Type of COVID-19 vaccine | ✅ |
| Other vaccinations / vaccination history | ✅ |
| COVID-19 symptoms & contacts | |
| COVID-19 episodes | ✅ |
| COVID-19 symptoms (type, severity, duration) | ✅ |
| Influenza-like symptoms (type, timing, duration) | |
| COVID-19 health-seeking behaviour | |
| COVID-19 contacts in household | |
| Medications during C-19 episode | ✅ |
| Pregnancy & birth | |
| Date of delivery | ✅ |
| Length of gestation | |
| Birthweight | |
| Maternal age at delivery | ✅ |
| Pregnancy complications | |
| Smoking pre-pregnancy | ✅ |
| Vaccines in pregnancy (non-COVID-19) | ✅ |
| Parity / nulliparity | |
| Pre-pregnancy body mass index | ✅ |
| Pregnancy outcome (e.g. miscarriage) | |
| Mode of delivery | |
| Sex of baby | ✅ |
| Congenital anomalies | |
| Other newborn complications | |
| Placental weight | |
| Antenatal care usage | |
| Currently pregnant | ✅ |
| Death | |
| Date of / age at death | ✅ |
| Cause of death | |
| COVID-19 laboratory tests | |
| Sample type tested | |
| Sample / specimen collection date | |
| SARS-CoV-2 PCR test date | ✅ |
| SARS-CoV-2 PCR pos / neg result | ✅ |
| SARS-CoV-2 PCR Ct Value | |
| SARS-CoV-2 LFT test date | |
| SARS-CoV-2 LFT test result | |
| Serology test date | ✅ |
| Serology test results | ✅ |
| SARS- COV-2 genomic test results | |
| SARS- COV-2 variant/ lineage | |
| Other lab tests | |
| COVID-19 sample collection / storage | |
| Sample type collected | |
| Sample collection date | |
| Sample collection time | |
| Sample processing | |
| Sample quality | |
| Consent to use research sample | |
| Consent to share research sample | |