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Table 3 Baseline characteristics by leisure-time physical activity trajectory class across nuMoM2b study visits

From: Patterns of leisure-time physical activity across pregnancy and adverse pregnancy outcomes

Baseline characteristics Leisure-time physical activity trajectory class p-value1/
High Early decreasing Early increasing Late decreasing Low
(N = 3483) (N = 1017) (N = 1338) (N = 2404) (N = 1780)
Maternal age, in years
 Mean (standard deviation) 28.8 (5.4) 25.5 (5.5) 25.8 (5.8) 26.9 (5.4) 25.2 (5.6) <.0001
 Category: n (%)       <.0001
  13–21 427 (12.3) 301 (29.6) 372 (27.8) 478 (19.9) 551 (31.0)
  22–35 2735 (78.6) 682 (67.1) 886 (66.2) 1783 (74.2) 1131 (63.5)
   > 35 318 (9.1) 34 (3.3) 80 (6.0) 143 (5.9) 98 (5.5)
Maternal race: n (%)       <.0001
 White Non-Hispanic 2491 (71.6) 536 (52.7) 682 (51.0) 1540 (64.1) 740 (41.6)
  Black Non-Hispanic 290 (8.3) 180 (17.7) 256 (19.1) 330 (13.7) 362 (20.3)
 Hispanic 374 (10.7) 200 (19.7) 258 (19.3) 325 (13.5) 534 (30.0)
 Asian 151 (4.3) 35 (3.4) 62 (4.6) 95 (4.0) 64 (3.6)
 Other 174 (5.0) 66 (6.5) 80 (6.0) 114 (4.7) 80 (4.5)
Early Pregnancy BMI, in kg/m2
 Mean (standard deviation) 25.2 (5.3) 27.4 (6.9) 27.0 (6.8) 26.9 (6.8) 26.8 (6.4) <.0001
 Category: n (%)       <.0001
   < 25 2112 (61.7) 442 (44.2) 663 (50.3) 1180 (49.9) 797 (46.8)
  25 to < 30 803 (23.4) 282 (28.2) 293 (22.2) 586 (24.8) 480 (28.2)
   ≥ 30 510 (14.9) 275 (27.5) 361 (27.4) 601 (25.4) 426 (25.0)
Nausea, vomiting, retching in 12 h prior V1 interview: n (%) 1704 (49.0) 592 (58.2) 789 (59.0) 1317 (54.8) 1016 (57.1) <.0001
Smoked during 3 months prior to pregnancy: n (%) 487 (14.0) 223 (21.9) 288 (21.6) 392 (16.3) 392 (22.1) <.0001
Chronic hypertension: n (%) 43 (1.3) 36 (3.7) 36 (2.8) 84 (3.7) 43 (2.6) <.0001
Pre-gestational diabetes: n (%) 30 (0.9) 25 (2.5) 29 (2.2) 51 (2.2) 16 (1.0) <.0001
  1. 1/p-values are shown for chi-square tests (percent) and from ANOVA F-tests (mean [SD])