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Table 1 Interview process details: number of timestamped entries, response time and corrections

From: Paradata analyses to inform population-based survey capture of pregnancy outcomes: EN-INDEPTH study

Indicator

Overall

FPH

FBH+

P value$

Mean (SD)

Median

Range

 

Median

Range

Mean (SD)

Median

Range

N timestamped entries per interviewa

55.1 (33.4)

48

1–335

57.7 (34.9)

52

1–335

52.5 (31.5)

45

6–289

< 0.001

N questions answered per 1 interview

50.7 (29.6)

44

1–223

53.2 (31.1)

49

1–223

48.4 (27.8)

41

6–194

< 0.001

Response time per 1 interviewb, min

10.8 (14.3)

7.3

0.06–179.9

11.4 (14.8)

7.8

0.06–179.9

10.3 (13.3)

6.9

0.23–179.8

< 0.001

Response time per 1 questionb, min

0.4 (3.5)

0.08

0–179.9

0.4 (3.6)

0.08

0–179.9

0.4 (3.6)

0.07

0–179.9

 

N corrected questions per 1 interview

3.8 (4.8)

2

0–112

3.9 (4.9)

3

0–112

3.6 (4.8)

2

0–110

< 0.001

N corrected question per 10 questions

0.8 (0.9)

0.6

0–29.5

0.8 (0.9)

0.6

0–29.5

0.8 (0.9)

0.62

0–20.4

< 0.01

N corrections per 1 interview

4.4 (6.2)

3

0–227

4.6 (6.3)

3

0–227

4.2 (6.1)

2

0–149

< 0.01

Time spent on correction per 1 interview, min

1.9 (10.2)

0.3

0–179.6

2.0 (10.2)

0.3

0–174.5

1.9 (10.2)

0.2

0–179.6

< 0.01

Time spent on correction per 1 question, min

0.6 (5.6)

0.08

0–179.9

0.6 (5.5)

0.08

0–179.8

0.6 (5.6)

0.08

0–179.9

 

Response time per 1 interview, if all corrections avoided, min

9.4 (10.1)

6.9

0.06–179.5

9.9 (10.6)

7.4

0.06–179.5

8.8 (9.4)

6.5

0.2–179.4

< 0.001

Response time per 1 question, if corrections avoided, min

1.7 (4.5)

0.8

0.5–177.1

1.7 (4.5)

0.8

0.5–177.1

1.7 (4.5)

0.9

0.5–176.1

 

N interviews, n (%)

65,768 (100.0)

32,744 (49.8)

33,024 (50.2)

 

N interviews with at least 1 correction, n (%)

55,066/65,768 (83.7)

27,721/32,744 (84.6)

27,345/33,024 (82.8)

 
  1. Total percentages may not add up or exceed one hundred due to rounding up
  2. FPH full pregnancy history module, FBH+ full birth history module with additional questions on pregnancy losses
  3. $P values for independent sample t test that compared means for two groups
  4. aAll timestamped entries, including answer corrections
  5. bAll answers, accounting for correction time