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Table 3 Risk of being tested, diagnosed and treated for genital Chlamydia trachomatis in the intervention and control groups, the risk ratios and the risk differences by age group and gender in a randomized trial of information and home sampling, Rogaland county, Norway 2006

From: Systematic screening with information and home sampling for genital Chlamydia trachomatis infections in young men and women in Norway: a randomized controlled trial

Outcome

Intervention

Control

Risk ratio (95% confidence interval)

Risk difference (95% confidence interval)

  

n/N

Risk (%)

n/N

Risk (%)

Women 18–21 year

Tested

507/2453

20.6

485/7829

6.2

3.3 (3.0 – 3.7)

14.5% (12.8 – 16.2)

Diagnosed

37/2453

1.5

63/7829

0.8

1.9 (1.3 – 2.8)

0.70% (0.18 – 1.2)

Treated

34/2453

1.4

58/7829

0.7

1.9 (1.2 – 2.9)

0.65% (0.15 – 1.2)

Women 2225 year

Tested

473/2470

19.1

358/7687

4.7

4.1 (3.6 – 4.7)

14.5% (12.9 – 16.1)

Diagnosed

29/2470

1.2

18/7687

0.2

5.0 (2.8 – 9.0)

0.94% (0.50 – 1.4)

Treated

26/2470

1.1

16/7687

0.2

5.1 (2.7 – 9.4)

0.84% (0.43 – 1.3)

All women

Tested

980/4923

19.6

843/15516

2.3

3.7 (3.4 – 4.0)

14.5% (13.3 – 15.6)

Diagnosed

66/4923

1.3

81/15516

0.5

2.6 (1.9 – 3.5)

0.82% (0.48 – 1.2)

Treated

60/4923

1.2

74/15516

0.5

2.6 (1.8 – 3.6)

0.74% (0.42 – 1.1)

Men 1821 year

Tested

322/2552

12.6

124/8060

1.5

8.2 (6.7 – 10.0)

11.1% (9.8 – 12.4)

Diganosed

20/2552

0.8

26/8060

0.3

2.4 (1.4 – 4.3)

0.46% (0.10 – 0.82)

Treated

15/2552

0.6

23/8060

0.3

2.1 (1.1 – 3.9)

0.30% (0 – 0.62)

Men 2225 year

Tested

351/2525

13.9

105/7942

1.3

10.5 (8.5 – 13.0)

12.6% (11.2 – 14.0)

Diagnosed

19/2525

0.8

18/7942

0.2

3.3 (1.7 – 6.3)

0.53% (0.17 – 0.88)

Treated

14/2525

0.6

14/7942

0.2

3.1 (1.5 – 5.6)

0.38% (0.07 – 0.68)

All men

Tested

673/5077

12.4

229/16002

1.4

9.3 (8.0 – 10.8)

11.8% (10.9 – 12.8)

Diagnosed

39/5077

0.8

44/16002

0.3

2.8 (1.8 – 4.3)

0.49% (0.24 – 0.75)

Treated

29/5077

0.6

37/16002

0.2

2.5 (1.5 – 4.0)

0.34% (0.12 – 0.56)