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Table 2 Characteristics of study sample

From: Delaying first birth: an analysis of household survey data from rural Southern Tanzania

Background characteristics All women 13–49 years (N = 3578) Sexually active (married and unmarried) women 13–49 years included in the analysis (N = 2128)
n % (95% CI) n % (95% CI)
Age groups (yrs)
 13–14 205 6 (5–7) 10 <1 (0–1)
 15–19 529 15 (14–16) 182 9 (7–10)
 20–24 491 14 (12–15) 297 14 (12–16)
 25–29 466 13 (12–14) 312 15 (13–17)
 30–34 527 15 (13–16) 355 17 (15–18)
 35–39 519 15 (13–16) 344 16 (15–18)
 40–44 504 14 (13–15) 361 17 (16–19)
 45–49 337 9 (8–11) 267 13 (11–14)
Median age
 Median 3578 30 (IQR 21–39) 2128 33 (IQR 25–41)
Marital status
 Currently married 2344 66 (64–67) 1713 80 (79–82)
 Cohabiting 82 2 (2–3) 59 3 (2–4)
 Divorced/separated 439 12 (11–13) 212 10 (9–11)
 Widow 22 1 (0–1) 4 <1 (0–0)
 Single 691 19 (18–21) 140 7 (6–8)
Education
 No education 463 13 (11–15) 286 13 (12–16)
 Some primary 474 13 (12–15) 243 11 (10–13)
 Completed primary 604 73 (70–75) 1574 74 (72–77)
 Some secondary or higher 30 1 (0–2) 20 1 (0–2)
Religion
 Muslim 3459 97 (95–98) 2054 97 (95–98)
 Others 119 3 (2–5) 74 3 (2–5)
Ethnicity
 Makonde 3338 93 (91–95) 1965 92 (90–94)
 Others 238 7 (5–9) 162 8 (6–10)
Household socio-economic status
 Q1 (most poor) 420 12 (10–13) 306 10 (8–11)
 Q2 586 16 (15–18) 334 16 (14–18)
 Q3 692 19 (18–21) 414 19 (18–21)
 Q4 914 26 (23–28) 5611 26 (24–29)
 Q5 (least poor) 966 27 (24–30) 613 29 (26–32)
Parity
 Mean parity 3578 3 births (range 0–11) 2128 3 births (range 0–11)
Total 3578 100 2128 59
  1. IQR Inter-quartile range, 25th and 75th percentiles