Table 2.

Test of difference for specified background variables for respondents and non-respondents.

Variable	Respondents	Non-respondents	P-value
Preoperative forms distributed (%)	782 (98.7)	125 (83.3)
Mean age in yrs (SD; n)	63.6 (11; 782)	62.1 (11.9; 125)
Age group
< 50 years n (mean age yrs)	91 (44.1)	17 (42.4)	0.952
> 50 years n (mean age yrs)	700 (66.1)	133 (65.4)
Mean parity (SD; n)	2.47 (1.14; 741)	2.44 (1.27; 102)	0.799
Mean BMI (SD; n)	25.96 (3.6; 720)	26.3 (3.6; 102)	0.383
Mean weigh in kg (SD; n)	69.46 (10.75; 732)	70.18 (10.76; 104)	0.519
Mean height in cm (SD; n)	163.4 (6.0; 735)	163.1 (5.6; 103)	0.602
Patient's first rank of discomfort is prolapse
n (mean)	750 (1.24)	105 (1.26)	0.771
Hypertension
yes % (n)	32 (250)	29.6 (37)	0.597
don't know % (n)	68 (532)	70.4 (88)
Current disease other than gynecologic
Yes % (n)	65.9 (396)	69.3 (61)	0.525
no % (n)	34.1 (205)	30.7 (27)
Diabetes mellitus
yes % (n)	5.8 (35)	14.8 (13)	0.002
no % (n)	94.2 (566)	85.2 (75)
Asthma
Yes % (n)	4.2 (25)	10.2 (9)	0.014
no % (n)	95.8 (576)	89.8 (79)
Current use of estrogen
yes % (n)	34.3 (192)	28.4 (23)	0.294
no % (n)	65.7 (368)	71.6 (58)
Smoking
yes % (n)	12.5 (74)	18.4 (16)	0.127
no % (n)	87.5 (520)	81.6 (71)
Registration forms distributed* (%)	791 (100)	150 (100)	0.947
Mean uterine size estimated as corresponding gestational age (SD; n)	3.27 (1.66; 775)	3.28 (1.63; 143)
ASA I† % (n)	88.9 (518)	80 (68)	0.020
ASA II† or more % (n)	11.1 (65)	20 (17)
Number of operation forms available (%)	791 (100)	150 (100)
Mean duration time in minutes (SD; n)	76.61 (29.7; 778)	77.84 (30.1; 143)	0.652
Mean blood loss in ml (SD; n)	127.38 (131.3; 757)	128.86 (129.7; 138)	0.903

(Student's t- test for parametric data and Pearson's chi-square test for categorical data).

SD, Standard deviation; n, number of patients in each group.

* Registration forms were completed by the surgeon when decision for surgery was made.

† American Society of Anesthesiologists Physical Status Classification System.