Study group

“Prog. group”

(n = 73)

Control group

“Place. group”

(n = 71)

T. test

p-value

Age (years)

(mean ± SD)

24.45 ± 4.58

25.28 ± 4.30

0.944

0.347

Gravidity (mean ± SD)

4.25 ± 1.35

4.32 ± 1.42

0.255

0.799

Parity (mean ± SD)

2.01 ± 1.24

2.08 ± 1.41

0.266

0.790

Mode of previous delivery (n,%)

Vaginal

Cesarean

28 (38.36%)

45 (61.64%)

26 (36.62%)

45 (63.38%)

0.046

0.829

Occupation (n,%)

Occupied

Non-occupied

30 (41.10%)

43 (58.90%)

29 (40.85%)

42 (59.15%)

0.001

0.975

Residence (n,%)

Rural

Urban

44 (60.27%)

29 (39.73%)

40 (56.34%)

31 (43.66%)

0.227

0.633

BMI

(mean ± SD kg/m²)

21.3 ± 2.23

21.7 ± 2.11

0.931

0.354

Gestational age at first visit (weeks) (mean ± SD)

12.13 ± 1.10

11.95 ± 1.30

−0.753

0.452

Cervical length (cm)

(mean ± SD)

3.9 ± .0.7

4.2 ± 0.93

1.835

0.069

Cervical diameter (mm)

(Inner to inner) (mean ± SD)

2.85 ± 1.00

3.19 ± 0.89

1.816

0.072

Main presentation (n,%)

Pain + bleeding

Bleeding alone

27 (36.99%)

46 (63.01%)

29 (40.85%)

42 (59.15%)

0.224

0.635