Table 2 Logistic regression of socio-demographics in predicting booking appointments and pregnancy outcome. (Reference group is late booking)

Age <19 years

n = 1200 (4.0 %)

n = 362 (7.7 %)

1.919 [1.740 to 2.117]

P < 0.001

Non-white ethnic background

n = 4750 (16.0 %)

n = 1668 (35.6 %)

3.07 [2.9 to 3.28]

P < 0.001

IMD score

n = 9257 (31.1 %)

n = 1875 (40.0 %)

1.092 [1.008–1.182]

P < 0.001

Maternal un-employment

n = 4263 (14.4 %)

n = 1254 (26.8 %)

3.74 [3.43 to 4.10],

P < 0.001

Partner un-employment

n = 753 (2.5 %)

n = 227 (4.8 %)

2.92 [2.49 to 3.42]

P < 0.001

Smoking status

n = 4348 (14.6 %)

n = 873 (18.6 %)

1.34 [1.24–1.46]

P < 0.001

Stillbirth

n = 155 (0.5 %)

n = 52 (1.1 %)

2.21 [1.53 to 2.87]

P < 0.001

Low birth weight

n = 2133 (7.2 %)

n = 491 (10.5 %)

1.52 [1.37 to 1.61]

P < 0.001

Premature delivery

n = 2103 (7.1 %)

n = 484 (10.3 %)

1.51 [1.36–1.68]

P < 0.001

Admission to SCBU

n = 1815 (6.1 %)

n = 482 (10.3 %)

1.7 [1.53 to 1.89]

P < 0.001