No | Author, publication year, design (matched variables), study site, country, PW (no, HBsAg +%) , enrolled period (and NOS) | Inclusion/exclusion | Identification of HBsAg/GDM (data retrieval) | Baseline comparison between HBsAg + and HBsAg- PW | Effect estimation (95% CI)/adjustment variables | |
---|---|---|---|---|---|---|
Similarity | Dissimilarity | |||||
1. | Wong SF, 1999 | PW delivered after 24 GW or babies with BW ≥ 500 g/AHP, non-SP, acute pelvic inflammatory disease, STI, smoker or illicit drug users, and DM | ELISA/Australian criteria (computer database) | Mean age, parity, history of abortion | NA | ORc = 1.05 (0.69, 1.61) |
RCS, with all HBsAg- as controls | ||||||
ORa = 1.00 (0.56,1.76)*1/NA | ||||||
Princess Margaret Hospital | ||||||
Hongkong, China | ||||||
SP (7105, 11.6%) | ||||||
Jul.1,1996-Aug.31,1998 (6) | ||||||
2. | Lao TT, 2003 | Chinese PW, recruited at 28-30 GW, haemoglobin concentration ≥10 g/dl and mean cell volume ≥ 80 fL at the initial visit at or before 14 GW/antenatal visit after 14 GW, anemia or hemoglobinopathy, GDM diagnosed before 28 GW, non-SP | ELISA/WHO criteria (medical record) | Weight, height, BMI, parity, socioeconomic status | The HBsAg + PW were significantly older, with more OGTTs performed, with higher iron status, with higher prevalence of past obstetric history, family or medical history and had an advanced age (≥35 years) | RRc = 2.97 (2.00, 4.42) |
RCS, with a sample as controls | ORc = 3.94 (2.27, 6.84) | |||||
Queen Mary Hospital or others | RRa = 3.51 (1.83, 6.73)/Age, BMI, socioeconomic status, parity and presence of significant obstetrics, family and past history. | |||||
Hongkong, China | ||||||
SP (767, NA) | ||||||
Over four months (5) | ||||||
3. | To WWK, 2003 | PW delivered after 24 GW/AHP(2); incomplete or contradicting data(152) | ELISA/Australian criteria (computer database) | Age, GW at delivery, BMI, parity, incidence of non-SP or STIs; no clinical manifestations of liver disorders or hepatitis. | A higher prop. of HBsAg + PW from mainland China | ORc = 0.81 (0.59, 1.12 ) |
RCS, with all HBsAg- as controls | ||||||
ORa = 0.77 (0.47, 1.26)*1/NA | ||||||
United Christian Hospital | ||||||
Hongkong, China | ||||||
AP (13946, 9.72%) | ||||||
Jan. 1997-Dec. 2000 (6) | ||||||
4. | Tse KY, 2005 | NA/incomplete data | ELISA/WHO criteria (medical record) | BMI, height, weight and Hb level at booking, ethnic, history of stillbirth, IVF pregnancy, haemoglobin level at booking, past medical history | Among the HBsAg + PW, the weight gain in those with GDM was significant less than those without GDM. | ORc = 1.89 (1.14, 3.13) |
RCS, matched for age and parity | ||||||
ORa = 2.04 (1.21, 3.44)/Age, weight and parity | ||||||
Queen Mary Hospital (section mainly for high-risk paturients) | ||||||
Hongkong, China | ||||||
SP (3348, 7.56%) | Among the HBsAg- PW, the weight gain in those with GDM was non-significant less than those without GDM. | |||||
Jan. 2000-2002 (7) | ||||||
5. | Lao TT, 2007 | SP, 99% of those PW delivered at or after 24 GW/incomplete data (147) | ELISA/ WHO criteria*4 (computer database, ICD coding) | Age, height, parity and history of DM | The HBsAg + PW had lower weight and BMI, with lower prop. of overweight and smokers, and with higher prop. of Asian origin, married, unemployed and history of induced abortion. | ORc = 1.31(1.08, 1.57) |
RCS, with all HBsAg- as controls | ||||||
ORa = 1.24 (1.01, 1.51)/parity, age, BMI, presence of iron deficiency anaemia, and smoking. | ||||||
Queen Mary Hospital | ||||||
Hongkong, China | ||||||
SP (14464, 8.3%) | ||||||
1998-2001 (8) | ||||||
6. | Lert-amornpong S,2007 | Healthy PW Age 20-39 years old/chronic illness, non-SP, HIV+, smoker, alcohol drinker | ELISA/NDDG (medical record) | Age, weight at booking, weight gain, hematocrit at booking, history of contraception, parity and past health. | NA | ORc = 3.04 (0.60, 15.28) |
RCS, matched for age and date of delivery | ||||||
ORa = 2.89 (0.55, 15.17)*1/NA | ||||||
Phramongkutklao College of Medicine | ||||||
Bangkok,Thailand | ||||||
SP (8515, 1.93%) | ||||||
Jan.1, 2003-Dec.31,2005 (5) | ||||||
7. | Thungsuk R, 2008 | Healthy PW | ELISA/ADA (medical record) | Age, hematocrit at booking, parity and past health | NA | ORc = 1.39 (0.37, 5.28) |
RCS, matched for age, parity and year of delivery | Age 20-39Â years old/chronic illness, non-SP, HIV+, smoker, alcohol drinker | |||||
ORa = 1.32 (0.33, 5.29)*1/NA | ||||||
Sawanpracharak Hospital | ||||||
Nakhonsawan, Thailand | ||||||
AP (2548, 1.3%) | ||||||
Jan. 2005-Dec, 2007 (5) | ||||||
8. | Saleh-Gargari S, 2009 | SP/AHP | ELISA/ADA (medical record) | Age, parity, BMI, hemoglobin level at admission, past health history | NA | ORc = 4.13 (1.96, 8.70) |
RCS, matched for age, parity, and BMI | ||||||
ORa = 3.62 (1.60, 7.90)/NA | ||||||
the labor ward in Mahdieh and Vali Asr Tertiary Care Hospital | ||||||
Tehran, Iran | ||||||
SP (NA, NA) | ||||||
Mar. 2001-Dec. 2008 (6) | ||||||
9. | Aghamohammadi A, 2011 | SP/ | ELISA/ADA (medical record) | Age, parity, haemoglobin level at booking, past medical history | NA | ORc = 2.34 (1.32, 4.17) |
RCS, matched for age and parity, selected at random | AHP | ORa = 1.53 (1.19, 1.97)/NA | ||||
the labor ward in Imam Khomeyni | ||||||
Sari, Iran | ||||||
SP (2953, 5.07%) | ||||||
Jan.,2005-Dec.,2008 (6) | ||||||
10. | Lobstein S, 2011 | SP (8193)/non-SP (427); HBsAg not available (887) | ELISA/IADPSG (computer database) | BMI, age, history of stillbirths, ectopic pregnancies, IVF pregnancies | The HBsAg + PW had lower weight and height, higher prop. of Asian origin, married, unemployed, history of induced abortion, and lower prop. of primipara | ORc = 2.82 (0.17, 46.68) |
RCS, with all HBsAg- as controls | ||||||
ORa = 2.20 (0.13, 37.03)*1/NA | ||||||
Gynecological University Hospital | ||||||
Leipizig, Germany | ||||||
AP (9507, 0.48%) | ||||||
Jan 1, 2001-Dec. 31,2006 (6) | ||||||
11. | Reddick KL, 2011 | NA/DM, HCV | ELISA/ADA | NA | The HBsAg + PW were younger, with more black and Asian, and higher prop. of public-assisted insurance, any substance use, any STI and medical complications | ORc = 1.78 (1.27, 2.50) |
RCS, with all HBsAg- as controls | ||||||
ORa = 1.39 (0.88, 2.12)/age, race, insurance status, substance use, STI and medical complications | ||||||
1054 hospitals | ||||||
37 states, USA | ||||||
AP (297664, 0.27%) | ||||||
1995–2005 (8) | ||||||
12. | Lu YP, 2012 | SP/pre-existing diabetes, impaired glucose tolerance, hypertension, etc; syphilis, HIV; co-infected or super-infected with HCV, HDV, HAV, HEV and other infections, smokers drug users, alcohol drinkers and prescription users. | ELISA/ADA (medical record) | Age, height, BMI before pregnancy, parity, times of pregnancy, GW | NA | ORc = 0.90 (0.48, 1.67) |
RCS, with a random sample of all HBsAg- as controls | ||||||
ORa = 0.85 (0.41, 1.77)*1/NA | ||||||
First Affiliated Hospital of Jinan University | ||||||
Guangzhou,,China | ||||||
SP (NA, NA) | ||||||
May 2009-Jul. 2011 (6) | ||||||
13. | Lao TT, 2013 | PW delivered at or after 24 GW/NA | ELISA/Australian criterion (computer database, ICD coding) | Height and medical history | The HBsAg + PM were insignificantly younger, and with higher prop. of overweight, BMI and multiple parity | ORc = 0.96 (0.88, 1.04) |
RCS, with all HBsAg- as controls | ORa = 0.91 (0.62, 1.34)*1/NA | |||||
Princess of Wales Hospital | ||||||
Hongkong, China | ||||||
SP (86537, 10.0%) | ||||||
Jan. 1995-Dec. 2009 (5) | ||||||
14. | Mak SL, 2013 | PW delivered after 24 GW | ELISA/Australian criterion (computer database) | Maternal condition and past medical health | Parity was higher in HBsAg + PW | ORc = 0.97 (0.74, 1.28) |
RCS, with all HBsAg- as controls | ||||||
ORa = 0.92 (0.58, 1.48)*1/NA | ||||||
Queen Elizabeth Hospital | ||||||
Hongkong, China | ||||||
AP (9526, 7.85%) | ||||||
Oct. 1st, 2010- Dec. 31st, 2011 (6) |