Table 3 Descriptive statistics by mailing

Variable

1^st mailing n = 1001

2^nd mailing n = 520

3^rd mailing n = 389

P value

Age (years)

<0.05

   ≤50

239 (24.0)

95 (18.5)

97 (25.1)

   51–65

261 (26.2)

146 (28.4)

87 (22.5)

   >65

496 (49.8)

274 (53.2)

202 (52.3)

Gender

0.53

   Men

532 (53.6)

289 (56.5)

205 (53.4)

   Women

460 (46.4)

223 (43.6)

179 (46.6)

Education level

<0.05

   None/primary school

642 (67.3)

358 (73.2)

270 (73.0)

   Secondary/university

312 (32.7)

131 (26.8)

100 (27.0)

Work status

0.11

   Working/homemaker

382 (41.4)

169 (36.1)

150 (41.1)

   Unemployed

34 (3.7)

11 (2.4)

11 (3.0)

   Retired/disabled

499 (54.1)

279 (59.6)

202 (55.3)

   Student

8 (0.9)

9 (1.9)

2 (0.6)

Marital status

<0.01

   Married/cohabitating

693 (71.5)

333 (66.9)

235 (62.2)

   Single/divorced

142 (14.7)

78 (15.7)

60 (15.9)

   Widowed

134 (13.8)

87 (17.5)

83 (22.0)

Who fulfill the questionnaire

<0.001

   Alone

586 (60.6)

258 (51.8)

182 (48.0)

   With help

381 (39.4)

240 (48.2)

197 (52.0)