Table 1 Sociodemographic characteristics and prevalence of multimorbidity and complex multimorbidity of pregnant women

Total

27771(100)

23105 [83.2(82.8–83.6)]

4666 [16.8(16.4–17.2)]

988 [3.6(3.3–3.8)]

Age at conception (years)

 15–19

1779(6.4)

1597 [89.8(88.4–91.2)]

182 [10.2(8.8–11.6)]

21 [1.2(0.7–1.7)]

 20–24

5048(18.2)

4161 [82.4(81.4–83.5)]

887 [17.6(16.5–18.6)]

160 [3.2(2.7–3.7)]

 25–29

8288(29.8)

6877[83.0(82.2–83.8)]

1411 [17(16.2–17.8)]

275 [3.3(2.9–3.7)]

 30–34

8000(28.8)

6699[83.7(82.9–84.5)]

1301[16.3(15.5–17.1)]

289 [3.6(3.2–4.0)]

 35–39

3881(14)

3161[81.4(80.2–82.7)]

720[18.6(17.3–19.8)]

208 [5.4(4.7–6.1)]

 40–44

725(2.6)

570[78.6(75.6–81.6)]

155[21.4(18.4–24.4)]

34 [4.7(3.2–6.2)]

 45–49

50(0.2)

40[80.0(68.9–91.1)]

10[20.0(8.9–31.1)]

< 5

Previous live birth

 0

11269 (40.6)

9668 [85.8(85.1–86.4)]

1601[14.2(13.6–14.9)]

300 [2.7(2.4–3.0)]

 1

10091 (36.3)

8538[84.6(83.9–85.3)]

1553 [15.4(14.7–16.1)]

330 [3.3(2.9–3.6)]

 2

3693 (13.3)

2863 [77.5(76.2–78.9)]

830 [22.5(21.1–23.8)]

184 [5.0(4.3–5.7)]

 3

1382 (5)

1048 [75.8(73.6–78.1)]

334 [24.2(21.9–26.4)]

94 [6.8(5.5–8.1)]

 4

403 (1.5)

287 [71.2(66.8–75.6)]

116 [28.8(24.4–33.2)]

28 [6.9(4.5–9.4)]

 5 + 

272 (1)

192 [70.6(65.2–76.0)]

80.0 [29.4(24.0–34.8)]

16 [5.9(3.1–8.7)]

 Missing

661 (2.4)

509 [77.0(73.8–80.2)]

152 [23.0(19.8–26.2)]

36 [5.4(3.7–7.2)]

Previous pregnancies

 0

8531(30.7)

7370 [86.4(85.7–87.1)]

1161[13.6(12.9–14.3)]

210 [2.5(2.1–2.8)]

 1

8926 (32.1)

7704 [86.3(85.6–87)]

1222 [13.7(13.0–14.4)]

236 [2.6(2.3–3.0)]

 2

4956 (17.9)

4068 [82.1(81–83.2)]

888 [17.9(16.8–19.0)]

193 [3.9(3.4–4.4)]

 3

2622 (9.4)

2049[78.1(76.6–79.7)]

573 [21.9(20.3–23.4)]

134 [5.1(4.3–6.0)]

 4

1329 (4.8)

973 [73.2(70.8–75.6)]

356 [26.8(24.4–29.2)]

94 [7.1(5.7–8.5)]

 5

701(2.5)

477 [68.0(64.6–71.5)]

224 [32.0(28.5–35.4)]

51 [7.3(5.4–9.2)]

 6 + 

685 (2.5)

446 [65.1(61.5–68.7)]

239 [34.9(31.3–38.5)]

70 [10.2(8.0–12.5)]

 Missing

21 (0.1)

18 [85.7(70.7–100.7)]

< 5

< 5

Ethnicity

 White

20836 (75)

17375 [83.4(82.9–83.9)]

3461 [16.6(16.1–17.1)]

722 [3.5(3.2–3.7)]

 Mixed race

43 (0.2)

39 [90.7(82–99.4)]

< 5

< 5

 Black

140 (0.5)

131 [93.6(89.5–97.6)]

9 [6.4(2.4–10.5)]

< 5

 Asian

570 (2.1)

529 [92.8(90.7–94.9)]

41 [7.2(5.1–9.3)]

8 [1.4(0.4–2.4)]

 Others

411 (1.5)

343[83.5(79.9–87)]

68 [16.5(13–20.1)]

17 [4.1(2.2–6.1)]

 Missing

5771(20.8)

4688 [81.2(80.2–82.2)]

1083 [18.8(17.8–19.8)]

240 [4.2(3.6–4.7)]

Deprivation (SIMD)

 Most deprived

6056 (21.8)

4806 [79.4(78.3–80.4)]

1250 [20.6(19.6–21.7)]

293 [4.8(4.3–5.4)]

 2

5382 (19.4)

4318 [80.2(79.2–81.3)]

1064 [19.8(18.7–20.8)]

259 [4.8(4.2–5.4)]

 3

4653 (16.8)

3894 [83.7(82.6–84.7)]

759[16.3(15.3–17.4)]

150 [3.2(2.7–3.7)]

 4

4883 (17.6)

4248 [87(86.1–87.9)]

635 [13(12.1–13.9)]

119 [2.4(2–2.9)]

 Least Deprived

3441(12.4)

3024 [87.9(86.8–89)]

417 [12.1(11–13.2)]

69 [2(1.5–2.5)]

 Missing

3356 (12.1)

2815 [83.9(82.6–85.1)]

541 [16.1(14.9–17.4)]

98 [2.9(2.4–3.5)]

BMI

 Underweight (< 18.5)

583 (2.1)

500 [85.8(82.9–88.6)]

83 [14.2(11.4–17.1)]

11 [1.9(0.8–3.0)]

 Normal Weight (18.5–24.9)

9940 (35.8)

8603 [86.5(85.9–87.2)]

1337 [13.5(12.8–14.1)]

250 [2.5(2.2–2.8)]

 Overweight (25–29.9)

6036 (21.7)

5117 [84.8(83.9–85.7)]

919 [15.2(14.3–16.1)]

173 [2.9(2.4–3.3)]

 Obese (> 30)

5383 (19.4)

4262 [79.2(78.1–80.3)]

1121 [20.8(19.7–21.9)]

259 [4.8(4.2–5.4)]

 Missing

5829 (21)

4623 [79.3(78.3–80.4)]

1206 [20.7(19.6–21.7)]

295 [5.1(4.5–5.6)]

Smoking History

 Never smoked

16619 (59.8)

14429 [86.8(86.3–87.3)]

2190 [13.2(12.7–13.7)]

397 [2.4(2.2–2.6)]

 Current smoker

5373 (19.4)

3956 [73.6(72.4–74.8)]

1417 [26.4(25.2–27.6)]

356 [6.6(6.0–7.3)]

 Former smoker

3579 (12.9)

2912 [81.4(80.1–82.6)]

667 [18.6(17.4–19.9)]

139 [3.9(3.3–4.5)]

 Not known

2200 (7.9)

1808 [82.2(80.6–83.8)]

392 [17.8(16.2–19.4)]

96 [4.4(3.5–5.2)]